A multi-metal-cluster MOF with Cu4I4 and Cu6S6 as functional groups exhibiting dual emission with both thermochromic and near-IR character

Abstract

Two classical metal clusters, Cu I 4 I 4 and Cu I 6 S 6 , are introduced as functional connecting nodes to construct a novel multi-metal-cluster MOF [(Cu I 4 1) that incorporate their inherent luminescent properties, induced by their respective metal-metal interactions. These two distinct clusters are combined together for the first time to perform as functional luminophores that display unusual dual emission with both thermochromic luminescence and near-infrared (NIR) character.

Cu(I) hybrid inorganic–organic materials with intriguing stimuli responsive and optoelectronic properties

“…1H-6-methylpyridine-2-thione and 2,2"-bis(6-methylpyridyl)disulfide 5-(pyridin-4-yl)-1H-1,2,4-triazole-3-thiol (4-Hptt) M a n u s c r i p t Edited Mar 5 23 Aiming at obtaining a material with dual emission, the same group prepared the 3D MOF [(Cu 4 I 4 ) 3 (CuI 6 ) 2 (3-ptt) 12 ] n ·24nDEF·12nH 2 O, 61, with connecting nodes containing the Cu 4 I 4 and Cu 6 S 6 clusters as multi-luminophores [62]. The complex was prepared by reacting CuI with the organic ligand 5-(pyridin-3-yl)-1H-1,2,4-triazole-3-thiol (3-Hptt), that being less sterically hindered than the 4-Hptt previously reported [61], allowed the formation of both types of clusters ( Figure 11).…”

A microporous metal–organic framework with open metal sites for selective sensing Fe3+, CrO42- and nitrobenzene

“…Based on the its structural feature [21], fluorescence detection experiments were carried out with the DMF suspension of 1, which was carefully explored for sensing metal ions, anions and small organic molecules. Firstly, to investigate this potential application of 1 for heavy metal ions, 1 were ground and immersed in DMF solutions of M(NO 3 , respectively) for 24 h, and then oscillated for 30 min using ultrasonic waves to form uniform dispersion suspensions. The luminescent intensities of 1 are decreased sharply by Fe 3+ ion, indicating its highly selective sensor [22][23][24][25].…”

“…Extensive studies on MOF-based sensors focused on immobilization of Lewis basic sites within porous MOFs. A few of examples of porous MOFs with Lewis basic sites have been reported, including [Eu(btpca)(H 2 O)]·2DMF·3H 2 O [H 3 btpca = 1,1′,1″-(benzene-1,3,5-triyl)tripiperidine-4-carboxylic acid] with multiple Lewis basic triazinyl nitrogen atoms for the sensing of Fe 3+ ions [6], and [Eu 3 (bpydb) 3 (HCOO)(μ 3 -OH) 2 (DMF)]·(DMF) 3 (H 2 O) 2 [bpydbH 2 = 4,4′-(4,4′-bipyridine-2,6-diyl)dibenzoic acid] exhibits multi-responsive luminescence sensing of small organic molecules and inorganic ions [7]. These results highlight the significance of such Lewis basic sites within porous MOFs for their functional properties [8][9][10][11][12][13].…”

“…During the last ten years, continuous endeavors have been devoted to the design and preparation of various luminescent metal-organic framework because they might have some potential applications [1][2][3][4][5]. Extensive studies on MOF-based sensors focused on immobilization of Lewis basic sites within porous MOFs.…”

Three d10 metal coordination compounds based on pyrazole-3-carboxylic acid showing mixed-ligand characteristic: Syntheses, crystal structures, and photoluminescent properties

“…On the other hand, among the various applications of MOCCs as stated above, the photoluminescence of MOCCs and its related applications [35][36][37][38][39] e.g., the white-light emitter and fluorescence sensor attract more attention from scientists [40][41][42][43][44][45]. Take d 10 Zn(II) and Cd(II) ions for example, they can form coordination geometries varying from tetrahedron, trigonal-bipyramid and square-pyramid to octahedron, hence are suitable for constructing interesting photoluminescent MOCCs with diverse structures [35,36].…”