Visible-Light-Active Titanium Sulfonate Framework for Photocatalytic Organic Synthesis

Abstract

In this work, the first visible-light-active titanium sulfonate metal−organic framework (denoted as FIR-138) with 2-fold interpenetrated srs topology was synthesized by employing 2,5-dihydroxy-1,4-benzenedisulfonic acid (H 4 DOBSC) as ligands. The strong chelating coordination ability of the hydroxyl and sulfonate O atoms from H 4 DOBSC endows the framework of FIR-138 with good stability, while the formation of the Ti-phenolic motif ensures excellent visible light absorption with a bandgap (E g ) of 1.74 eV. More importantly, the extensive titanium active sites within the structure could trap the photogenerated electrons and promote the charge separation effectively, attributed to the excellent visible light photocatalytic performance in organic reaction. FIR-138's capability to harness visible light for photocatalytic reactions presents a promising advancement in the field of Ti-MOF photocatalysts. These results provide valuable insights and open up new avenues for the rational design and synthesis of visible-light-active Ti-MOF photocatalysts.

A Multistimuli-Responsive Cd-MOF Constructed by an Extended Viologen-Based Carboxylate Ligand

“…The excellent and reversible photochromic properties of Cd-MOF- 1 inspired us to investigate its application in ink-free erasable printing. − Unlike some reported cases of ink-free erasable printing using filter paper as a substrate, we attempted to mix Cd-MOF- 1 with polydimethicone (PDMS) to prepare an ink-free erasable printing Cd-MOF- 1 @PDMS film. − The printing process is shown in Figure a. The template is covered on the film to control the incident area of light so as to realize the printing of the target pattern.…”

Heterometallic MIL-125(Ti–Al) frameworks for electrochemical determination of ascorbic acid, dopamine and uric acid

“…1–5 The structures and structure-related properties of MOFs can be tuned by judicious design of both constituents at the molecular level. 6 Owing to their unlimited structural diversity and functional tunability, 7,8 MOFs have become one of the most fascinating classes of materials in numerous areas including gas storage and separation, 9–11 ion exchange, 12 chemical sensing, 13–15 catalysis, 16–18 energy harvesting, 19,20 and biomedicine. 21,22 Since multivariate MOFs were reported by the Yaghi group, and more and more multi-component MOFs with complementary or contradictory properties were created to obtain better performance, 23–25 tremendous efforts have been devoted to introducing multiple metal centers or ligands to improve the properties of the targeted MOF materials.…”

A chelating coordination modulation method for the synthesis of Ti-MOF single crystals

“…8 Among MOFs, titanium-based metal–organic frameworks (Ti-MOFs) have garnered special attention due to their excellent photocatalytic activity. 9–21 Nevertheless, the scarcity of Ti-MOFs has limited the research in this area, with the focus mainly on two Ti-MOFs (MIL-125 and MIL-125-NH 2 ) reported over ten years ago. 22–24 Therefore, there is an urgent need to synthesize new Ti-MOFs.…”