A hydrazone-based covalent organic framework/iridium (III) complex for photochemical CO2 reduction with enhanced efficiency and durability

Development of heterogeneous photocatalystsviathe covalent grafting of metal complexes on various solid supports

“…25). 108 Moreover, their results suggested that the synergistic combination of COF and Ir-ppy led to an enhancement in reactivity (2.3 times) compared to the bare [Ir-ppy]. Interestingly, the immobilization of [Ir-ppy] helped in achieving recyclability for up to 5 times and the heterogeneous catalyst remained active for 7 h upon irradiation, whereas [Ir-ppy] lost its activity within 30 min.…”

Recent trends in covalent organic frameworks (COFs) for carbon dioxide reduction

“…You et al demonstrated a heterogeneous photocatalytic system based on an iridium complex (Ir-ppy) and hydrazone-based COF (NAHN-Tp), which acts as a photosensitizer and can absorb visible light energy. 128 The formed 2D hydrazone-based COF synthesized from 1,3,5-triformylphloroglucinol (Tp) and N -amino-4-hydrazino-1,8-naphthalimide (NAHN) and combined with NAHN-Tp(Ir-ppy) took part in the photochemical CO 2 reduction to CO [Fig. 8].…”

Porous framework-based hybrid materials for solar-to-chemical energy conversion: from powder photocatalysts to photoelectrodes

“…193 On the basis of such advantages, COFs have been utilized as CO2RR cocatalysts for solar-to-chemical energy conversion. For example, You et al 194 prepared a hydrazine-based metalfree COF, NAHN-Tp COF, by using 1,3,5-triformylphloroglucinol and N-amino-4-hydrazino-1,8-naphthalimide. [Ir(tpy)( ppy) Cl] + (PF 6 ) − (Ir-ppy) was used as a photosensitizer, and NAHN-Tp COF was used as a cocatalyst in acetonitrile for photocatalytic CO2RR.…”