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Novel Supramolecular Photocatalyst Based on Conjugation of Cucurbit[7]uril to Non‐Metallated Porphyrin for Electrophotocatalytic Hydrogen Generation from Water Splitting
Author(s) -
Kumar Yogesh,
Patil Bhushan,
Khaligh Aisan,
Hadi Seyed E.,
Uyar Tamer,
Tuncel Dönüs
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900144
Subject(s) - porphyrin , photocatalysis , supramolecular chemistry , visible spectrum , photochemistry , hydrogen production , nanocomposite , water splitting , chemistry , hydrogen , catalysis , materials science , combinatorial chemistry , nanotechnology , organic chemistry , molecule , optoelectronics
Visible‐light triggerable, stable, organic material‐based photocatalysts that can function in alkaline media without the necessity of sacrificial agent for hydrogen production are highly sought after. Here, we report a novel supramolecular photocatalyst that confers the aforementioned features. This supramolecular photocatalyst ( TPP‐4CB7 ) is synthesized through the conjugation of monohydroxylated cucurbit(7)uril (CB7) hosts to a suitably substituted tetraphenyl porphyrin. Although TPP‐4CB7 by its own preforms as an efficient visible light triggered photocatalyst, the hydrogen production efficiency is significantly enhanced upon mixing with TiO 2 . The resulting nanocomposite ( TPP‐CB‐TiO 2 @Pt) is observed to exhibit remarkable electrophotocatalytic activity under visible light and produces hydrogen (onset potential −10 mV, turn over frequency (TOF) 0.202 s −1 , 24.5 mmol h −1 g −1 ) from water splitting without any significant degradation during four runs (5 h each) in alkaline media and in the absence of sacrificial agent.