{'fraction_non_alphanumeric': 0.03325942350332594, 'fraction_numerical': 0.0066518847006651885, 'mean_word_length': 5.541062801932367, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Redox Coupling Effect in a Photocatalytic Ru(II)-Pd(II) Cage with TTF Guest as Electron Relay Mediator for Visible-Light Hydrogen-Evolving Promotion.

The chemical nanospace confinement effect on the physicochemical properties of host-guest systems is of pivotal interest to enzyme-mimicking study. Herein we demonstrate a nanocage coupling effect from a redox Ru(II)-Pd(II) metal-organic cage (MOC-16) for efficient photochemical H 2 production by virtue of redox-guest modulation of the photo-induced electron transfer (PET) process. Through coupling with photoredox cycle of MOC-16, tetrathiafulvalene (TTF) guests act as electron relay mediator to improve the overall electron transfer efficiency in the host-guest system in a long-time scale, leading to significant promotion of visible-light driven H 2 evolution. By contrast, the presence of larger TTF-derivatives in bulk solution without host-guest interactions results in interference with PET process of MOC-16, leading to inefficient H 2 evolution. Such interaction protocol provides an example to understand the interplay between redox active nanocage and guest for optimization of redox events and photocatalytic activities in a spatially confined chemical nanoenvironment, which might be extendable to other enzyme-mimicking photochemical molecular device (PMD) at a supramolecular level.