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A novel photosensitizer (PS) was developed by anchoring an Ir(III) complex on a macroscopic polymer substrate to prevent ligand dissociation of the PS, resulting in a long duration of over 730 h in photocatalytic hydrogen evolution. This study paves the way for designing new Ir(III) PSs and exploring the inactivation mechanism of PSs. [ABSTRACT FROM AUTHOR]

We report the preparation of glycidyl azide polymers (GAPs) by the reaction of a prepolymer polyepichlorohydrin (PECH) with sodium azide (NaN3) in mixture solvents of different mass ratios with ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and water without catalysts. The formation of GAP was confirmed by IR and NMR spectroscopy, and the molecular weight of the product was determined by gel permeation chromatography (GPC). The conversion of PECH was identified via quantitative 13C-NMR spectroscopy. This method avoids solvent pollution and simplifies the reaction post-processing. The reaction was monitored by IR and 13C-NMR. We concluded that the relative solubility of the reaction substrate in the mixed solvents has an important effect on the degree of the reaction. [ABSTRACT FROM AUTHOR]

This paper investigates the required properties of Ru-coordinated ligands of a Ni-Ru based hydrogenase mimic. A series of ligands, including MeCN, pyridine, H(2)O and OH(-) were coordinated to Ru, with H(2)O being the only ligand to promote H(2)-activation. In addition, a tethered pyridyl moiety was synthesised and found to completely inhibit H(2)-activation. We conclude, therefore, that H(2)O is the ideal ligand for this mimic as a result of both its mild basicity and the availability of two lone pairs for simultaneous binding to Ru and H(2).