The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol

1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. Th...
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Gespeichert in:

Autor*in:	Adam, Farook [verfasserIn] Hassan, Hiba Eltahier [verfasserIn] Hello, Kasim Mohammed [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2012

Schlagwörter:	Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization

Übergeordnetes Werk:	Enthalten in: Journal of the Taiwan Institute of Chemical Engineers - Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9, Amsterdam [u.a.] : Elsevier, 2009, 43, Seite 619-630
Übergeordnetes Werk:	volume:43 ; pages:619-630

DOI / URN:	10.1016/j.jtice.2012.01.013

Katalog-ID:	ELV007575866

Internformat


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245	1	0	\|a The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
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520			\|a 1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand.
650		4	\|a Carbene–silica composite
650		4	\|a Cyclization of glycerol
650		4	\|a Nano-particles
650		4	\|a Acetalization
700	1		\|a Hassan, Hiba Eltahier \|e verfasserin \|4 aut
700	1		\|a Hello, Kasim Mohammed \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|a Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9 \|t Journal of the Taiwan Institute of Chemical Engineers \|d Amsterdam [u.a.] : Elsevier, 2009 \|g 43, Seite 619-630 \|h Online-Ressource \|w (DE-627)590281240 \|w (DE-600)2475165-0 \|w (DE-576)302970975 \|x 1876-1070 \|7 nnns
773	1	8	\|g volume:43 \|g pages:619-630
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912			\|a GBV_ILN_32
912			\|a GBV_ILN_40
912			\|a GBV_ILN_60
912			\|a GBV_ILN_62
912			\|a GBV_ILN_63
912			\|a GBV_ILN_65
912			\|a GBV_ILN_69
912			\|a GBV_ILN_70
912			\|a GBV_ILN_73
912			\|a GBV_ILN_74
912			\|a GBV_ILN_90
912			\|a GBV_ILN_95
912			\|a GBV_ILN_100
912			\|a GBV_ILN_101
912			\|a GBV_ILN_105
912			\|a GBV_ILN_110
912			\|a GBV_ILN_150
912			\|a GBV_ILN_151
912			\|a GBV_ILN_224
912			\|a GBV_ILN_370
912			\|a GBV_ILN_602
912			\|a GBV_ILN_702
912			\|a GBV_ILN_2001
912			\|a GBV_ILN_2003
912			\|a GBV_ILN_2004
912			\|a GBV_ILN_2005
912			\|a GBV_ILN_2006
912			\|a GBV_ILN_2008
912			\|a GBV_ILN_2011
912			\|a GBV_ILN_2014
912			\|a GBV_ILN_2015
912			\|a GBV_ILN_2020
912			\|a GBV_ILN_2021
912			\|a GBV_ILN_2025
912			\|a GBV_ILN_2026
912			\|a GBV_ILN_2027
912			\|a GBV_ILN_2034
912			\|a GBV_ILN_2038
912			\|a GBV_ILN_2044
912			\|a GBV_ILN_2048
912			\|a GBV_ILN_2049
912			\|a GBV_ILN_2050
912			\|a GBV_ILN_2055
912			\|a GBV_ILN_2056
912			\|a GBV_ILN_2059
912			\|a GBV_ILN_2061
912			\|a GBV_ILN_2064
912			\|a GBV_ILN_2065
912			\|a GBV_ILN_2068
912			\|a GBV_ILN_2088
912			\|a GBV_ILN_2111
912			\|a GBV_ILN_2112
912			\|a GBV_ILN_2113
912			\|a GBV_ILN_2118
912			\|a GBV_ILN_2122
912			\|a GBV_ILN_2129
912			\|a GBV_ILN_2143
912			\|a GBV_ILN_2147
912			\|a GBV_ILN_2148
912			\|a GBV_ILN_2152
912			\|a GBV_ILN_2153
912			\|a GBV_ILN_2190
912			\|a GBV_ILN_2232
912			\|a GBV_ILN_2470
912			\|a GBV_ILN_2507
912			\|a GBV_ILN_2522
912			\|a GBV_ILN_4035
912			\|a GBV_ILN_4037
912			\|a GBV_ILN_4046
912			\|a GBV_ILN_4112
912			\|a GBV_ILN_4125
912			\|a GBV_ILN_4126
912			\|a GBV_ILN_4242
912			\|a GBV_ILN_4251
912			\|a GBV_ILN_4305
912			\|a GBV_ILN_4313
912			\|a GBV_ILN_4322
912			\|a GBV_ILN_4323
912			\|a GBV_ILN_4324
912			\|a GBV_ILN_4325
912			\|a GBV_ILN_4326
912			\|a GBV_ILN_4333
912			\|a GBV_ILN_4334
912			\|a GBV_ILN_4335
912			\|a GBV_ILN_4338
912			\|a GBV_ILN_4393
951			\|a AR
952			\|d 43 \|h 619-630

Indexfelder

author_variant	f a fa h e h he heh k m h km kmh
matchkey_str	article:18761070:2012----::hsnhssfhtrccicreeiiaaoatceadtctltccii
hierarchy_sort_str	2012
publishDate	2012
allfields	10.1016/j.jtice.2012.01.013 doi (DE-627)ELV007575866 (ELSEVIER)S1876-1070(12)00024-7 DE-627 ger DE-627 rda eng 540 DE-600 Adam, Farook verfasserin aut The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand. Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization Hassan, Hiba Eltahier verfasserin aut Hello, Kasim Mohammed verfasserin aut Enthalten in Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9 Journal of the Taiwan Institute of Chemical Engineers Amsterdam [u.a.] : Elsevier, 2009 43, Seite 619-630 Online-Ressource (DE-627)590281240 (DE-600)2475165-0 (DE-576)302970975 1876-1070 nnns volume:43 pages:619-630 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 43 619-630
spelling	10.1016/j.jtice.2012.01.013 doi (DE-627)ELV007575866 (ELSEVIER)S1876-1070(12)00024-7 DE-627 ger DE-627 rda eng 540 DE-600 Adam, Farook verfasserin aut The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand. Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization Hassan, Hiba Eltahier verfasserin aut Hello, Kasim Mohammed verfasserin aut Enthalten in Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9 Journal of the Taiwan Institute of Chemical Engineers Amsterdam [u.a.] : Elsevier, 2009 43, Seite 619-630 Online-Ressource (DE-627)590281240 (DE-600)2475165-0 (DE-576)302970975 1876-1070 nnns volume:43 pages:619-630 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 43 619-630
allfields_unstemmed	10.1016/j.jtice.2012.01.013 doi (DE-627)ELV007575866 (ELSEVIER)S1876-1070(12)00024-7 DE-627 ger DE-627 rda eng 540 DE-600 Adam, Farook verfasserin aut The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand. Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization Hassan, Hiba Eltahier verfasserin aut Hello, Kasim Mohammed verfasserin aut Enthalten in Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9 Journal of the Taiwan Institute of Chemical Engineers Amsterdam [u.a.] : Elsevier, 2009 43, Seite 619-630 Online-Ressource (DE-627)590281240 (DE-600)2475165-0 (DE-576)302970975 1876-1070 nnns volume:43 pages:619-630 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 43 619-630
allfieldsGer	10.1016/j.jtice.2012.01.013 doi (DE-627)ELV007575866 (ELSEVIER)S1876-1070(12)00024-7 DE-627 ger DE-627 rda eng 540 DE-600 Adam, Farook verfasserin aut The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand. Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization Hassan, Hiba Eltahier verfasserin aut Hello, Kasim Mohammed verfasserin aut Enthalten in Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9 Journal of the Taiwan Institute of Chemical Engineers Amsterdam [u.a.] : Elsevier, 2009 43, Seite 619-630 Online-Ressource (DE-627)590281240 (DE-600)2475165-0 (DE-576)302970975 1876-1070 nnns volume:43 pages:619-630 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 43 619-630
allfieldsSound	10.1016/j.jtice.2012.01.013 doi (DE-627)ELV007575866 (ELSEVIER)S1876-1070(12)00024-7 DE-627 ger DE-627 rda eng 540 DE-600 Adam, Farook verfasserin aut The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand. Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization Hassan, Hiba Eltahier verfasserin aut Hello, Kasim Mohammed verfasserin aut Enthalten in Taiwan-Huaxue-Gongcheng-Xuehui ; ID: gnd/10370556-9 Journal of the Taiwan Institute of Chemical Engineers Amsterdam [u.a.] : Elsevier, 2009 43, Seite 619-630 Online-Ressource (DE-627)590281240 (DE-600)2475165-0 (DE-576)302970975 1876-1070 nnns volume:43 pages:619-630 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 43 619-630
language	English
source	Enthalten in Journal of the Taiwan Institute of Chemical Engineers 43, Seite 619-630 volume:43 pages:619-630
sourceStr	Enthalten in Journal of the Taiwan Institute of Chemical Engineers 43, Seite 619-630 volume:43 pages:619-630
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization
dewey-raw	540
isfreeaccess_bool	false
container_title	Journal of the Taiwan Institute of Chemical Engineers
authorswithroles_txt_mv	Adam, Farook @@aut@@ Hassan, Hiba Eltahier @@aut@@ Hello, Kasim Mohammed @@aut@@
publishDateDaySort_date	2012-01-01T00:00:00Z
hierarchy_top_id	590281240
dewey-sort	3540
id	ELV007575866
language_de	englisch
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author	Adam, Farook
spellingShingle	Adam, Farook ddc 540 misc Carbene–silica composite misc Cyclization of glycerol misc Nano-particles misc Acetalization The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
authorStr	Adam, Farook
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topic_title	540 DE-600 The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol Carbene–silica composite Cyclization of glycerol Nano-particles Acetalization
topic	ddc 540 misc Carbene–silica composite misc Cyclization of glycerol misc Nano-particles misc Acetalization
topic_unstemmed	ddc 540 misc Carbene–silica composite misc Cyclization of glycerol misc Nano-particles misc Acetalization
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title	The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
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title_full	The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
author_sort	Adam, Farook
journal	Journal of the Taiwan Institute of Chemical Engineers
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author_browse	Adam, Farook Hassan, Hiba Eltahier Hello, Kasim Mohammed
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author-letter	Adam, Farook
doi_str_mv	10.1016/j.jtice.2012.01.013
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title_sort	the synthesis of n-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
title_auth	The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
abstract	1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand.
abstractGer	1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand.
abstract_unstemmed	1-Butylimidazole (BIm) was successfully immobilized onto rice husk ash via 3-chloropropyltriethoxysilane (CPTES) to produce RHABIm-Cl. The chlorine was easily replaced with sulphate and phosphate anion at room temperature, and these modified catalysts were labeled as RHABIm-HSO4 and RHABIm-H2PO4. The percentage replacement of chlorine was 57% in RHABIm-HSO4. The RHABIm-HSO4 had a specific surface area of 194m2 g−1. The 29Si MAS NMR solid-state spectrum showed the presence of Q4, Q3, T3 and T2 silicon centers were present in RHABIm-HSO4 and RHABIm-H2PO4. RHABIm-H2PO4 was used to show the importance of the ionizable proton in the acid catalysis. It showed a higher catalytic activity and selectivity than RHABIm-HSO4 in the cyclization of glycerol (Gly) to cyclic acetals. The catalytic activities of RHABIm-H2PO4 and RHABIm-HSO4 were determined to be 80 and 75% respectively. The benzaldehyde (Benz) conversion over RHABIm-HSO4 was achieved in 6h with high selectivity toward the five-member ring isomer. The kinetic study over RHABIm-HSO4 showed the reaction obeyed the pseudo-first order rate law. RHABIm-HSO4 was stable and re-used several times with only minor loss in catalytic activity due to possible leaching of the organic ligand.
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title_short	The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol
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doi_str	10.1016/j.jtice.2012.01.013
up_date	2024-07-06T16:44:21.110Z
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The synthesis of N-heterocyclic carbene–silica nano-particles and its catalytic activity in the cyclization of glycerol

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