A heterogeneous mesoporous silica-supported cyclopentadienyl ruthenium(II) complex catalyst for selective hydrosilylation of 1-hexyne at room temperature

2015 ◽  
Vol 503 ◽  
pp. 203-208 ◽  
Author(s):  
Dang Do Van ◽  
Takuya Hosokawa ◽  
Masakazu Saito ◽  
Yu Horiuchi ◽  
Masaya Matsuoka
Keyword(s):  
Mesoporous Silica ◽  
Room Temperature ◽  
Complex Catalyst

Selective functionalization of the outer surface of MCM-48-type mesoporous silica nanoparticles at room temperature

2020 ◽  
Vol 22 (9) ◽  
Author(s):  
Shewaye Yismaw ◽  
Stefan G. Ebbinghaus ◽  
Marianne Wenzel ◽  
David Poppitz ◽  
Roger Gläser ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Outer Surface ◽  
Room Temperature ◽  
Mesoporous Silica Nanoparticles ◽  
Selective Functionalization

scholarly journals Catalytic Asymmetric Allylation of Aldehydes with Alkenes Mediated by Organophotoredox and Chiral Chromium Hybrid Catalysis

2018 ◽  
Author(s):  
Harunobu Mitsunuma ◽  
Shun Tanabe ◽  
Hiromu Fuse ◽  
Kei Ohkubo ◽  
Motomu Kanai
Keyword(s):  
Visible Light ◽  
Hybrid System ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Functional Group ◽  
Light Irradiation ◽  
Asymmetric Allylation ◽  
Complex Catalyst ◽  
Homoallylic Alcohols ◽  
Catalytic Asymmetric

A hybrid system accomplishing cooperativity between an organophotoredox acridinium catalyst and a chiral chromium<br>complex catalyst was developed, enabling the unprecedented exploitation of unactivated hydrocarbon alkenes as precursors to chiral allylchromium nucleophiles for the asymmetric allylation of aldehydes. The reaction proceeded under visible light irradiation at room temperature and with high functional group tolerance, affording the corresponding homoallylic alcohols with up to >20/1 diastereomeric ratio and 99% ee. The addition of Mg(ClO4)2 elicited profound enhancement of both reactivity and enantioselectivity.

Efficient and selective oxidation of alcohols to carbonyl compounds at room temperature by a ruthenium complex catalyst and hydrogen peroxide

2019 ◽  
Vol 43 (48) ◽  
pp. 19415-19421 ◽  
Author(s):  
Jie-Xiang Wang ◽  
Xian-Tai Zhou ◽  
Qi Han ◽  
Xiao-Xuan Guo ◽  
Xiao-Hui Liu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
Carbonyl Compounds ◽  
Room Temperature ◽  
Ruthenium Complex ◽  
Secondary Alcohols ◽  
Complex Catalyst ◽  
Efficient System ◽  
Oxidation Of Alcohols

An efficient system comprising a ruthenium complex and hydrogen peroxide was developed for the oxidation of various primary and secondary alcohols at room temperature.

scholarly journals One-Pot Room-Temperature Synthesis of Mg Containing MCM-41 Mesoporous Silica for Aldol Reactions

2018 ◽  
Vol 34 (12) ◽  
pp. 2521-2528 ◽  
Author(s):  
Shin-Ichiro Fujita ◽  
Shinji Segawa ◽  
Kazuki Kawashima ◽  
Xuejing Nie ◽  
Tomoki Erata ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Room Temperature ◽  
Aldol Reactions ◽  
Temperature Synthesis ◽  
One Pot ◽  
Room Temperature Synthesis ◽  
Mcm 41

Facile route to tin oxide containing mesoporous silica composites with room-temperature photoluminescence

2006 ◽  
Vol 21 (3) ◽  
pp. 655-663 ◽  
Author(s):  
Zhicheng Liu ◽  
Hangrong Chen ◽  
Weiming Huang ◽  
Jinlou Gu ◽  
Wenbo Bu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Tin Oxide ◽  
Room Temperature ◽  
Uv Light ◽  
Treatment Method ◽  
Preparation Temperature ◽  
Strong Emission ◽  
Room Temperature Photoluminescence ◽  
Near Ultraviolet ◽  
Facile Route

In this paper, we report a facile route, the tin vapor treatment method, to prepare tin oxide containing mesoporous silica composites (TOMS), which display room-temperature photoluminescence (RT-PL). Among them, TOMS-1 and TOMS-2 were synthesized from mesoporous silica SBA-15 and KIT-6, respectively. They are composed of amorphous SiO2 and tin oxide species and they display strong emission near ultraviolet (UV) when excited by UV light. By increasing the preparation temperature, their Sn content can be increased and subsequently their photoluminescence (PL) intensities can be greatly enhanced. Besides, their PL properties are revealed to be closely related to 2-fold-coordinated tin oxygen-deficient centers.

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