All-in-One: Achieving Robust, Strongly Luminescent and Highly Dispersible Hybrid Materials by Combining Ionic and Coordinate Bonds in Molecular Crystals

Abstract

Extensive research has been pursued to develop low-cost and high-performance functional inorganic-organic hybrid materials for clean/renewable energy related applications. While great progress has been made in the recent years, some key challenges remain to be tackled. One major issue is the generally poor stability of these materials, which originates from relatively fragile/weak bonds between inorganic and organic constituents. Herein, we report a unique "all-in-one" (AIO) approach in constructing robust structures with desired properties. Such approach allows formation of both ionic and coordinate bonds within a molecular cluster, which greatly enhances structural stability while maintaining the molecular identity of the cluster and its high luminescence. The novel AIO structures are composed of various anionic (CuI) clusters and cationic N-ligands. They exhibit high luminescence efficiency, significantly improved chemical, thermal and moisture stability, and excellent solution processability. Both temperature dependent photoluminescence experiments and DFT calculations are performed to investigate the luminescence origin and emission mechanism of these materials, and their suitability as energy-saving LED lighting phosphors is assessed. This study offers a new material designing strategy that may be generalized to many other material classes.

Quaternary Phosphorus‐Induced Iodocuprate(I)‐Based Hybrids: Water Stabilities, Tunable Luminescence and Photocurrent Responses

“…Up to now, one of the critical drawbacks of photoluminescence (PL) materials is their generally low water stability, which will deter their real applications . In this work, the alkyl modification on phosphine ligands has been conducted, which might improve their water stability.…”

“…The strategy might help to improve the luminescence properties of iodocuprate‐based PL materials. Besides, the alkyl modification on phosphine ligands can improve their water stability, which will obviously decrease the fabricating costs and elongate the working life of related devices , . In this work, four kinds of (triphenyl)phosphonium‐based quaternary phosphorus salts containing different substituents (varying from methyl to n ‐butyl) on P atoms were used as structural directed agents (SDAs) to synthesize four new iodocuprates(I) hybrids, i.e., [(PPh 3 Me)(Cu 3 I 4 )] n ( 1 ), [(PPh 3 Et)(Cu 3 I 4 )] n ( 2 ), (PPh 3 i Pr) 2 (Cu 2 I 4 ) ( 3 ), [(PPh 3 n Bu)(Cu 3 I 4 )] n ( 4 ).…”

Caesium for Perovskite Solar Cells: An Overview

“…In the framework of light-induced effects in advances materials, [256][257][258][259][260][261][262][263][264] photoluminescencep robes for metal ions represent another challenging application for Cs-based perovskites. Indeed, due to the significance of metal ions in biological and industrial systems, demand is growingf or strategies of trace metal ions probingu nder variousc onditions.…”

<p>Multifunctional Quaternary Phosphorus/Bromoargentate Hybrids: The Achievement of Greenish Blue Luminescence, Repeatable Photocurrent Responses and Durable Antimicrobial Activities with Enhanced Water Stability</p>

“…Third, the alkyl modification on phosphine ligands can improve the stabilities, which will obviously decrease the fabricating costs and elongate the working life of related devices. 19,20 Finally, quaternary phosphorus salt and silver-bearing compounds are traditional antibacterial materials, their hybridization will help improve antibacterial performance. 21,22 In this work, alkyl-bis-(triphenyl)phosphoniums with different spacer lengths (spacer n=2, 3, 4) were used as organic templates to obtain three new bromoargentate hybrids, ie, (…”

“…Third, the alkyl modification on phosphine ligands can improve the stabilities, which will obviously decrease the fabricating costs and elongate the working life of related devices. 19 , 20 Finally, quaternary phosphorus salt and silver-bearing compounds are traditional antibacterial materials, their hybridization will help improve antibacterial performance. 21 , 22 In this work, alkyl-bis-(triphenyl)phosphoniums with different spacer lengths (spacer n=2, 3, 4) were used as organic templates to obtain three new bromoargentate hybrids, ie, (1,2-DBTPP)(Ag 2 Br 4 ) ( 1 ), {(1,3-DBTPP) 2 (Ag 7 Br 11 )]∙CH 3 CN∙H 2 O} n ( 2 ), and {[(1,4-DBTPP)(Ag 5 Br 7 )](CH 3 CN) 2 ∙H 2 O} n ( 3 ) (1,2-DBTPP 2+ =ethane-1,2-diylbis (triphenyl)phosphonium, 1,3-DBTPP 2+ =propane-1,3-diylbis (triphenyl)phosphonium, 1,4-DBTPP 2+ =butane-1,4-diylbis (triphenyl)phosphonium)).…”