Standard

Titanium-silica catalyst derived from defined metallic titanium cluster precursor : Synthesis and catalytic properties in selective oxidations. / Evangelisti, Claudio; Guidotti, Matteo; Tiozzo, Cristina et al.

In: Inorganica Chimica Acta, Vol. 470, 30.01.2018, p. 393-401.

Research output: Contribution to journal › Article › peer-review

Harvard

Evangelisti, C, Guidotti, M, Tiozzo, C, Psaro, R, Maksimchuk, N, Ivanchikova, I, Shmakov, AN & Kholdeeva, O 2018, 'Titanium-silica catalyst derived from defined metallic titanium cluster precursor: Synthesis and catalytic properties in selective oxidations', Inorganica Chimica Acta, vol. 470, pp. 393-401. https://doi.org/10.1016/j.ica.2017.06.059

APA

Evangelisti, C., Guidotti, M., Tiozzo, C., Psaro, R., Maksimchuk, N., Ivanchikova, I., Shmakov, A. N., & Kholdeeva, O. (2018). Titanium-silica catalyst derived from defined metallic titanium cluster precursor: Synthesis and catalytic properties in selective oxidations. Inorganica Chimica Acta, 470, 393-401. https://doi.org/10.1016/j.ica.2017.06.059

Vancouver

Evangelisti C, Guidotti M, Tiozzo C, Psaro R, Maksimchuk N, Ivanchikova I et al. Titanium-silica catalyst derived from defined metallic titanium cluster precursor: Synthesis and catalytic properties in selective oxidations. Inorganica Chimica Acta. 2018 Jan 30;470:393-401. doi: 10.1016/j.ica.2017.06.059

Author

Evangelisti, Claudio ; Guidotti, Matteo ; Tiozzo, Cristina et al. / Titanium-silica catalyst derived from defined metallic titanium cluster precursor : Synthesis and catalytic properties in selective oxidations. In: Inorganica Chimica Acta. 2018 ; Vol. 470. pp. 393-401.

BibTeX

@article{ed42c8e5ffb74430b391d78f4d65fd69,
title = "Titanium-silica catalyst derived from defined metallic titanium cluster precursor: Synthesis and catalytic properties in selective oxidations",
abstract = "A class of titanium-grafted mesoporous silica catalysts has been designed and prepared starting from molecularly defined metal clusters. The organosol mixture of zerovalent Ti13 clusters was impregnated onto the surface of ordered mesoporous silica molecular sieves (MCM-41 and MMM-2) and, after high-temperature calcination, an evenly dispersed non-single-site Ti(IV)nOx-like silica-supported catalyst was obtained. The catalytic solids, fully characterized by microscopic, spectroscopic and porosimetric techniques, showed standard performance in the liquid-phase epoxidation of a cyclic alkene, as limonene, but remarkably high selectivity values in the oxidative carboxylation of styrene, with tert-butylhydroperoxide and carbon dioxide in the presence of tetrabutylammonium bromide as a cocatalyst. Unprecedented high yields, up to 67%, in styrene carbonate were achieved after 24 h, under solvent-free conditions. The catalysts displayed also a noteworthy stability of the performance to repeated recovery and reuse cycles.",
keywords = "Alkene epoxidation, Heterogeneous catalysis, Mesoporous silica, Oxidative carboxylation, Titanium clusters, ACTIVE-SITES, MOLECULAR-SIEVES, SILSESQUIOXANE COMPLEXES, CYCLOHEXENE EPOXIDATION, SITE HETEROGENEOUS CATALYSTS, LIQUID-PHASE, SINGLE-SITE, ALTERNATING COPOLYMERIZATION, FINE CHEMICALS, MESOPOROUS SILICA",
author = "Claudio Evangelisti and Matteo Guidotti and Cristina Tiozzo and Rinaldo Psaro and Nataliya Maksimchuk and Irina Ivanchikova and Shmakov, {Alexandr N.} and Oxana Kholdeeva",
year = "2018",
month = jan,
day = "30",
doi = "10.1016/j.ica.2017.06.059",
language = "English",
volume = "470",
pages = "393--401",
journal = "Inorganica Chimica Acta",
issn = "0020-1693",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Titanium-silica catalyst derived from defined metallic titanium cluster precursor

T2 - Synthesis and catalytic properties in selective oxidations

AU - Evangelisti, Claudio

AU - Guidotti, Matteo

AU - Tiozzo, Cristina

AU - Psaro, Rinaldo

AU - Maksimchuk, Nataliya

AU - Ivanchikova, Irina

AU - Shmakov, Alexandr N.

AU - Kholdeeva, Oxana

PY - 2018/1/30

Y1 - 2018/1/30

N2 - A class of titanium-grafted mesoporous silica catalysts has been designed and prepared starting from molecularly defined metal clusters. The organosol mixture of zerovalent Ti13 clusters was impregnated onto the surface of ordered mesoporous silica molecular sieves (MCM-41 and MMM-2) and, after high-temperature calcination, an evenly dispersed non-single-site Ti(IV)nOx-like silica-supported catalyst was obtained. The catalytic solids, fully characterized by microscopic, spectroscopic and porosimetric techniques, showed standard performance in the liquid-phase epoxidation of a cyclic alkene, as limonene, but remarkably high selectivity values in the oxidative carboxylation of styrene, with tert-butylhydroperoxide and carbon dioxide in the presence of tetrabutylammonium bromide as a cocatalyst. Unprecedented high yields, up to 67%, in styrene carbonate were achieved after 24 h, under solvent-free conditions. The catalysts displayed also a noteworthy stability of the performance to repeated recovery and reuse cycles.

AB - A class of titanium-grafted mesoporous silica catalysts has been designed and prepared starting from molecularly defined metal clusters. The organosol mixture of zerovalent Ti13 clusters was impregnated onto the surface of ordered mesoporous silica molecular sieves (MCM-41 and MMM-2) and, after high-temperature calcination, an evenly dispersed non-single-site Ti(IV)nOx-like silica-supported catalyst was obtained. The catalytic solids, fully characterized by microscopic, spectroscopic and porosimetric techniques, showed standard performance in the liquid-phase epoxidation of a cyclic alkene, as limonene, but remarkably high selectivity values in the oxidative carboxylation of styrene, with tert-butylhydroperoxide and carbon dioxide in the presence of tetrabutylammonium bromide as a cocatalyst. Unprecedented high yields, up to 67%, in styrene carbonate were achieved after 24 h, under solvent-free conditions. The catalysts displayed also a noteworthy stability of the performance to repeated recovery and reuse cycles.

KW - Alkene epoxidation

KW - Heterogeneous catalysis

KW - Mesoporous silica

KW - Oxidative carboxylation

KW - Titanium clusters

KW - ACTIVE-SITES

KW - MOLECULAR-SIEVES

KW - SILSESQUIOXANE COMPLEXES

KW - CYCLOHEXENE EPOXIDATION

KW - SITE HETEROGENEOUS CATALYSTS

KW - LIQUID-PHASE

KW - SINGLE-SITE

KW - ALTERNATING COPOLYMERIZATION

KW - FINE CHEMICALS

KW - MESOPOROUS SILICA

UR - http://www.scopus.com/inward/record.url?scp=85024501978&partnerID=8YFLogxK

U2 - 10.1016/j.ica.2017.06.059

DO - 10.1016/j.ica.2017.06.059

M3 - Article

AN - SCOPUS:85024501978

VL - 470

SP - 393

EP - 401

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

SN - 0020-1693

ER -

ID: 9265381