Monocarboxylate-driven structural growth in Calix[n]arene-polyoxotitanate hybrid systems: utility in hydrogen production from water

Abstract

A carboxylate-driven assembly strategy has first been developed to build calix[n]arene-based polyoxotitanate clusters with tuneable nuclearity and structures. Photocatalytic studies revealed that those clusters exhibit structural-dependent H2 evolution ability with...

Calixarene-Protected Titanium-Oxo Clusters and Their Photocurrent Responses and Photocatalytic Performances

“…Their unique properties, such as multiple active sites, diverse configurations, and rich coordination modes, make them one of the most attractive choices for use as modified ligands in TOCs. The use of calixarenes in metal coordination compounds has been intensively investigated; − however, Ti-calixarene complexes have received far less attention than those of other metals. − To the best of our knowledge, the first calixarene-protected TOC was published independently by Power and Atwood . Research work on the molecular structure, binding modes, and chemical modifications of these complexes has subsequently been published. − Yuan et al isolated a monomeric bowl-like pyrogallol[4]­arene Ti 12 coordination complex, which is the highest-nuclearity TOC derived from calixarenes .…”

“…The use of calixarenes in metal coordination compounds has been intensively investigated; − however, Ti-calixarene complexes have received far less attention than those of other metals. − To the best of our knowledge, the first calixarene-protected TOC was published independently by Power and Atwood . Research work on the molecular structure, binding modes, and chemical modifications of these complexes has subsequently been published. − Yuan et al isolated a monomeric bowl-like pyrogallol[4]­arene Ti 12 coordination complex, which is the highest-nuclearity TOC derived from calixarenes . More recently, Liu et al reported a family of calixarene-protected TOCs synthesized by a carboxylate-driven assembly strategy and investigated the structural dependence of the hydrogen-evolution ability of these TOCs .…”

“…Research work on the molecular structure, binding modes, and chemical modifications of these complexes has subsequently been published. − Yuan et al isolated a monomeric bowl-like pyrogallol[4]­arene Ti 12 coordination complex, which is the highest-nuclearity TOC derived from calixarenes . More recently, Liu et al reported a family of calixarene-protected TOCs synthesized by a carboxylate-driven assembly strategy and investigated the structural dependence of the hydrogen-evolution ability of these TOCs . To gain a deeper understanding of the calixarene–TiO core interaction, band structures, and structure–property relationships, further research on calixarene-protected TOCs is required.…”

Co‐polymerization of propylene oxide and CO2 using early transition metal (groups IV and V) metallocalix[n]arenes (n = 4, 6, 8)

“…Each molecule comprises a Ti 4 O 4 ladder, with end chlorides 'up', and middle two chlorides 'down'. We note that calix[8]arene titanium ladder complexes have recently been isolated and utilized for CO 2 photoreduction and photocatalytic H 2 production 71–73 . In 10·6.5(MeCN), there are two triply‐bridging oxo bridges, and terminal coordinated MeCNs on the two end Ti ions.…”

“…For 10Á6.5(MeCN), two Ti 4 complexes and 13 MeCNs of crystallization are found in the We note that calix [8]arene titanium ladder complexes have recently been isolated and utilized for CO 2 photoreduction and photocatalytic H 2 production. [71][72][73] In 10Á6.…”