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

Abstract

Three photosensitive tert-butylcalix[n]arene (TBC-[n], n = 4, 6, 8)-protected titanium-oxo clusters (TOCs), formulated as [Ti 4), were successfully synthesized and characterized. Because of the generation of charge transfer from TBC[n] to the TiO core, the three TBC[n]-decorated TOCs show a broadened visible-light absorption and narrowed optical band gap based on the UV−visible spectra and density functional theory calculations. The corresponding photosensitive electrodes prepared using these three TOCs exhibit stable photocurrent responses. Furthermore, their photocatalytic performances for hydrogen evolution and methylene blue degradation were evaluated, and all of the materials display excellent photocatalytic activity and stability. The calixarene-Ti coordination is therefore an effective strategy to enlarge the visible-light absorption band of Ti−O materials and improve their photoelectric/photocatalytic performances.

“Three-in-One” Structural-Building-Mode-Based Ti16-Type Titanium Oxo Cluster Entirely Protected by the Ligands Benzoate and Salicylhydroxamate

“…Until now, a few TOCs that exhibit good photodegradation activity toward organic dyes had been reported. ,− Given the high hydrolytic stability and suitable band-gap value, complex 2 is also expected to be an effective photocatalyst for photodegradation. The activity of the photodegradation of MO of 2 is investigated under UV/vis light.…”

A Three-Component Hybrid Templated by Asymmetric Viologen Exhibiting Visible-Light-Driven Photocatalytic Degradation on Dye Pollutant in Maritime Accident Seawater

“…This result clearly demonstrates the charges in this electrode can be separated efficiently. The good photocurrent density can be explained as the wide absorption band in visible zone or narrow optical gap [28].…”

Fluorescein-appended calixarene-functionalized supramolecular AIE-active liquid crystalline materials for self-assembly and bio-imaging applications

“…11 The chemistry of calixarenes has been applied in diverse areas such as the biomedical, host-guest interactions, sensing of explosives, organic, hydrogel, selective membranes, self-assembly, asymmetrical catalysis, and many other electro-optical applications. [12][13][14][15] Calixarene core contains p-electronic conjugative systems with hydrophobic and hydrophilic sides, which provides a good platform for further functionalization by various groups and moieties to enhance the activity in various applications. 16 The literature presents several supramolecular LCs based on the calix [4]arene core, [17][18][19][20] however, very few display fluorescent properties.…”