A luminescent zinc(ii) coordination polymer with unusual (3,4,4)-coordinated self-catenated 3D network for selective detection of nitroaromatics and ferric and chromate ions: a versatile luminescent sensor

Abstract

A zinc(ii) coordination polymer {[Zn3(mtrb)3(btc)2]·3H2O}n (1) was synthesized and characterized (mtrb = 1,3-bis(1,2,4-triazole-4-ylmethyl)benzene, btc = 1,3,5-benzenetricarboxylate). The polymer 1 shows an unusual (3,4,4)-coordinated self-catenated 3D network with the point symbol of {63}2{62·82·102}{64·82}2. The polymer 1 is the first luminescent sensor for the detection of 2-amino-4-nitrophenol (ANP). The polymer 1 is also a good luminescence sensor for detection of TNP, 2,4-DNP, 4-NP, ANP and 2-NP in MeOH, particularly for TNP. The order of detection efficiency is TNP > 2,4-DNP > 4-NP > ANP > 2-NP. The polymer 1 also exhibits high sensitivity and selectivity as a luminescence sensor for the detection of Fe3+, Cr2O72- and CrO42- in aqueous solution. Our experiments showed that the presence of interfering ions had no significant effect on the sensing of Fe3+, Cr2O72- or CrO42- ions. The detection limits for TNP, ANP, Fe3+, Cr2O72- and CrO42- are 0.22 μM, 4.12 μM, 1.78 μM, 2.83 μM, and 4.52 μM, respectively. The luminescence sensor is stable and can be recycled for detection at least five times. The possible quenching mechanisms are discussed. The polymer 1 is also an effective photocatalyst for degradation of methylene blue (MB) under visible or UV light irradiation.

Cobalt(II) and silver(I) coordination polymers containing flexible bis (benzimidazol‐1‐yl)hexane ligands: synthesis, crystal structures, sensing and photocatalytic properties

“…It can be observed in Figure S8, the absorption spectra of Fe 3+ have a large overlap with the excitation spectra of 1 and the absorption spectra of Cr 2 O 7 2− has a large overlap with the excitation spectra of 2 . However, no overlap was observed for other metal cations or anions . Based on these evidences, we suggest that the competitive absorption of excitation wavelength energy and the interaction between Fe 3+ /Cr 2 O 7 2− and organic ligand result in the quenching effect as reported in some literatures …”

Crystal Structures, Hirshfeld Surfaces, and Thermal Study of Isostructural Polymeric Ladders of La(III) and Sm(III) Coordination Compounds with 4,4’-Bipyridine and Dibromoacetates

“…These compounds find applications in many different areas of everyday life, industry, and science. Some of the examples are sensors and biosensors [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ], electronic and optoelectronic devices [ 9 , 10 ], chemical catalysts, and photocatalysts [ 11 , 12 , 13 , 14 , 15 , 16 ]. Some coordination polymers can be used to remove harmful substances [ 17 , 18 , 19 , 20 ] or to capture and entrap other molecules [ 21 , 22 ].…”

Construction of (3,8)-connected three-dimensional cobalt(II) and copper(II) coordination polymers with 1,3-bis[(1,2,4-triazol-4-yl)methyl]benzene and benzene-1,3,5-tricarboxylate ligands

“…At the same time, the 1-and 2-position N atoms of 4-substituted 1,2,4-triazole ligands exhibit a strong coordination ability; therefore, bis(4-substituted 1,2,4-triazole) ligands can relatively easily construct metal-cluster coordination polymers. A few intriguing coordination polymers based on 1,3bis [(1,2,4-triazol-4-yl)methyl]benzene (mtrb) have been synthesized both by the Murdock group and by ourselves (Murdock & Jenkins, 2014;Zhang et al, 2018). In the present work, two coordination polymers, namely poly[( 5 -benzene-1,3,5-tricarboxylato-6 O 1 :O 1 0 :O 3 :O 3 :O 5 ,O 5 0 ){ 3 -1,3-bis[(1,2,4triazol-4-yl)methyl]benzene-3 N:N 0 :N 00 }di-3 -hydroxido-dicobalt(II)], [Co 2 (btc)(OH)(mtrb)] n , (1), and poly [[diaquabis( 3benzene-1,3,5-tricarboxylato-3 O 1 :O 3 :O 5 )bis{ 3 -1,3-bis[(1,2,4triazol-4-yl)methyl]benzene-3 N:N 0 :N 00 }tetra-3 -hydroxidotetracopper(II)] monohydrate], {[Cu 4 (btc) 2 (OH) 2 (mtrb) 2 -(H 2 O) 2 ]ÁH 2 O} n , (2), were synthesized by the hydrothermal method using mtrb and btc 3À .…”