Novel Bifunctional Catalysts of Cobalt Phthalocyanine Bonded to Organic-Functionalized Basic Calcined Mg–Al Hydrotalcite for Autoxidation of Mercaptans

Liu, Haichao; Yang, Xiaodong; Ran, Guopeng; Min, Enze

doi:10.3184/030823400103167354

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Synthesis. With the recent interest in developing organized organic−inorganic hybrid materials with potential multiple functions, we identified the periodic mesoporous organosilicas (PMOs) as platform substrates for bifunctional mesoporous materials. By creating structures that incorporated organic groups both in the channels and in the walls, we synthesized materials with new properties.…”

Section: Resultsmentioning

confidence: 99%

Novel Bifunctional Periodic Mesoporous Organosilicas, BPMOs: Synthesis, Characterization, Properties and in-Situ Selective Hydroboration−Alcoholysis Reactions of Functional Groups

et al. 2001

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A new class of bifunctional periodic mesoporous organosilicas (BPMOs) containing two differently bonded organic moieties in a mesoporous host has been synthesized and characterized. By incorporating bridge-bonded ethylene groups into the walls and terminally bonded vinyl groups protruding into the channel space, both the chemistry and physical properties of the resulting BPMO could be modified. The materials have periodic mesoporous structures in which the bridging ethylene plays a structural and mechanical role and the vinyl groups are readily accessible for chemical transformations. The vinyl groups in the material underwent hydroboration with BH(3).THF and the resulting organoborane in the BPMO was quantitatively transformed into an alcohol using either H(2)O(2)/NaOH or NaBO(3).4H(2)O. The materials retained ordered structures after subsequent in situ reactions with largely unchanged pore volumes, specific surface areas and pore size distributions. Other organic functionalized BPMO materials may be synthesized in a similar manner or by further functionalizing the resulting borylated or alcohol functionalized BPMO materials. The thermal properties of the BPMO materials have also been investigated and are compared to those of the periodic mesoporous organosilica (PMO) materials. Noteworthy thermal events concern intrachannel reactions between residual silanols or atmospheric oxygen and organics in BPMOs. They begin around 300 degrees C and smoothly interconvert bridging ethylene to terminal vinyl groups and terminal vinyl to gaseous ethene and ethane, ultimately producing periodic mesoporous silica at 900 degrees C that exhibits good structural order and a unit-cell size decreased relative to that of the parent BPMO.

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Section: Resultsmentioning

confidence: 99%

Novel Bifunctional Periodic Mesoporous Organosilicas, BPMOs: Synthesis, Characterization, Properties and in-Situ Selective Hydroboration−Alcoholysis Reactions of Functional Groups

et al. 2001

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“…[4][5][6][7][8] These solids have been used in a variety of reactions typically catalyzed by aqueous bases, such as aldol condensations, 6,9 alkylations, 10 Knoevenagel condensations, 11 and olefin isomerization. 9 Holmgren et al 2,12 and Liu et al [13][14][15] recently reported that Mg(Al)O-supported cobalt phthalocyanine bifunctional catalysts, which possess Co 2+ oxidation sites and Mg(Al)O base sites in cooperative interaction, can effectively oxidize mercaptans to disulfides. But for these catalysts, the effects of basic properties of the Mg(Al)O materials including the number, nature and strength of the basic sites have not been examined in detail.…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of mercaptans by bifunctional catalysts composed of cobalt phthalocyanine supported on Mg–Al hydrotalcite-derived solid bases: effects of basicity

Liu

Min²

2006

Green Chem.

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“…氧化反应在化学研究及工业生产方面均得到广泛的应用 [2] . 水滑石类材料由于具有独特的双层结构，可在环境友好的氧化反应中作为催化剂应用于多种化合物的氧化转化，这包括烷烃 [3] 、烯烃 [4] 、醇类 [5] 、硫醇化合物 [6] 、醛类 [7] 、酮类 [8] 、胺类 [9] 、吡啶类化合物 [10] 、苯酚 [11] 、氮氧化物 [12] 、一氧化碳 [12] 等. 在醇类氧化的绿色化研究方面，不采用目前广泛使用的均相体系，代之使用可回收反复使用的固体催化剂是目前研究的热点 [13鄄14] .…”

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Development of Catalysts with Tunable Catalytic Oxidative Performance for Alcohols Conversion

Ji¹,

Wang²,

Chen³

2005

Acta Physico-Chimica Sinica

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ThecatalyticoxidativeperformanceofMg鄄Al鄄Ru鄄CO 3 hydrotalcite,Co鄄Al鄄Ru鄄CO 3 hydrotalcite,Ru鄄 Co(OH) 2 鄄CeO 2 waswelldesignedandtunedwithsubstitutionmethod.TheXRDcharacterizationpresentedthat boththeMg鄄Al鄄Ru鄄CO 3 catalystandCo鄄Al鄄Ru鄄CO 3 catalystcouldkeephydrotalcitestructureafterthepartialsub鄄 stitutionofAlwithRu.However,afterthesubstitutionofAlwithCe,thestructureoftheobtainedRu鄄Co(OH) 2 鄄 CeO 2 catalystwasmicrocrystalsofcobalthydroxideandceriumoxide.TheresultsofXPSandRu K鄄edgeXAFS suggestedthattheisolatedRuatominMg鄄Al鄄Ru鄄CO 3 hydrotalcitewassurroundedby 6 oxygenatomswithonly onetypeofRu鄄O shells,whichcatalyzedalcoholsoxidationefficiently; theisolatedRuatominCo鄄Al鄄Ru鄄CO 3 hydrotalcitewassurroundedby 6 oxygenatomswithtwotypesofRu鄄O shells,thereinunsaturatedRu=Odouble bondwasresponsibleforhighercatalyticefficientforalcoholsoxidation;theisolatedRuatominRu鄄Co(OH) 2 鄄CeO 2 catalystsurroundedby 5 oxygenatomswithtwotypesofRu鄄O shells,thereintheunsaturatedcoordinationofRu wasthekeytoattainhigherabilityforvariouskindsofalcoholsoxidation.

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Novel Bifunctional Catalysts of Cobalt Phthalocyanine Bonded to Organic-Functionalized Basic Calcined Mg–Al Hydrotalcite for Autoxidation of Mercaptans

Abstract: Fig.1 Oxygen consumption plots for the autoxidation of 1-octanethiol at 35°C catalysed by CoPc-A (a), CoPcB (b), and CoPc-C (c).

Cited by 4 publications

References 9 publications

Novel Bifunctional Periodic Mesoporous Organosilicas, BPMOs: Synthesis, Characterization, Properties and in-Situ Selective Hydroboration−Alcoholysis Reactions of Functional Groups

Novel Bifunctional Periodic Mesoporous Organosilicas, BPMOs: Synthesis, Characterization, Properties and in-Situ Selective Hydroboration−Alcoholysis Reactions of Functional Groups

Catalytic oxidation of mercaptans by bifunctional catalysts composed of cobalt phthalocyanine supported on Mg–Al hydrotalcite-derived solid bases: effects of basicity

Development of Catalysts with Tunable Catalytic Oxidative Performance for Alcohols Conversion

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