Syntheses, structures, and magnetic properties of five coordination polymers constructed from biphenyl-3,4′,5-tricarboxylic acid and (bis)imidazole linkers

CrystEngComm ◽  
2014 ◽  
Vol 16 (15) ◽  
pp. 3203-3213 ◽  
Author(s):  
Xiutang Zhang ◽  
Liming Fan ◽  
Wei Zhang ◽  
Weiliu Fan ◽  
Liming Sun ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Tricarboxylic Acid ◽  
Hydrothermal Conditions

Five coordination polymers (CPs) based on biphenyl-3,4′,5-tricarboxylic acid and bis(imdizole) bridging linkers were synthesized under hydrothermal conditions.

Three new ZnII coordination polymers constructed from a semi-rigid tricarboxylic acid: structural changes caused by flexibility and luminescence sensing for hexavalent chromate anions

2019 ◽  
Vol 75 (9) ◽  
pp. 1286-1298 ◽  
Author(s):  
Yanyan An ◽  
Liping Lu ◽  
Miaoli Zhu
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Coordination Polymers ◽  
Structural Changes ◽  
Ph Value ◽  
Limit Of Detection ◽  
Weak Interactions ◽  
3D Structure ◽  
Tricarboxylic Acid ◽  
Hydrothermal Conditions

Coordination polymers (CPs) with specific structures and functional luminescence have been widely designed as sensors for detecting small molecules and ions. In this study, with or without the help of an N-donor auxiliary linker, three new ZnII CPs, namely, three-dimensional (3D) poly[[pentaaquabis[μ3-5-(4-carboxybenzyloxy)isophthalato]bis[μ6-5-(4-carboxylatobenzyloxy)isophthalato]di-μ3-hydroxido-hexazinc(II)] trihydrate], {[Zn6(C16H10O7)2(C16H9O7)2(OH)2(H2O)5]·3H2O} n or {[Zn6(μ3-HL)2(μ6-L)2(μ3-OH)2(H2O)5]·3H2O} n , (I), one-dimensional (1D) catena-poly[[[aqua(1,10-phenanthroline)zinc(II)]-μ2-5-(4-carboxybenzyloxy)isophthalato] dihydrate], {[Zn(C16H10O7)(C12H8N2)(H2O)]·2H2O} n or {[Zn(μ2-HL)(phen)(H2O)]·2H2O} n (phen is 1,10-phenanthroline), (II), and 3D poly[diaquatetrakis(4,4′-bipyridine)bis[μ6-5-(4-carboxylatobenzyloxy)isophthalato]di-μ3-formato-di-μ3-hydroxido-pentazinc(II)], [Zn5(C16H9O7)2(HCOO)2(OH)2(C10H8N2)4(H2O)2] n or [Zn5(μ4-L)2(bpy)4(μ2-OH)2(μ3-HCOO)2(H2O)2] n (bpy is 4,4′-bipyridine), (III), have been constructed from the semi-rigid tricarboxylic acid 5-(4-carboxybenzyloxy)isophthalic acid (H3 L) under hydrothermal conditions. CP (I) exhibits a twofold interpenetrated 3D+3D→3D skeleton with a 3,5-conn topology constructed from triangular trinuclear [Zn3(COO)4(μ3-OH)] clusters, in which the H3 L ligand adopts three different coordination modes. CP (II) exhibits a 1D infinite chain and stacking that gives a 3D structure mediated by hydrogen bonds and weak interactions. CP (III) is an interesting 3D 3,4,8-conn network including linear tetranuclear [Zn4(μ2-OH)2(HCOO)2(COO)2] clusters with a new {4·62}2{4·64·8}{46·619·83} topological symbol. The influences of the flexible –CH2–O– linker of the H3 L ligand and subtle environmental factors, such as solvent, pH value and auxiliary ligands, on the formation of the final structures are also discussed. The solid-state fluorescence spectra of CPs (I)–(III) were recorded at room temperature and all show better fluorescence performances than H3 L. In particular, (II) can act as a potential multifunctional fluorescent material for sensing hexavalent chromium ions in aqueous solution with high stability, selectivity and sensitivity. Under ultraviolet light of 365 nm from a UV lamp, a signal response of fluorescence from turning on to off can be observed with the naked eye. It was found that the detection for hexavalent chromium (i.e. Cr2O7 2−) by (II) has a high selectivity [K SV = 1.61 × 104 M −1 and limit of detection (LOD) = 0.434 µM] in aqueous solution. Quenching mechanisms were also studied in detail.

Four cobalt(ii) complexes based on a new tricarboxylate with a naphthalene ring and different N-containing ligands: synthesis, crystal structures and magnetic properties

2016 ◽  
Vol 40 (6) ◽  
pp. 5010-5018 ◽  
Author(s):  
Yan Fan ◽  
Dong-Cheng Hu ◽  
Xiao-Qiang Yao ◽  
Yun-Xia Yang ◽  
Jia-Cheng Liu
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Coordination Polymers ◽  
Naphthalene Ring ◽  
Hydrothermal Conditions

Four cobalt(ii) coordination polymers have been synthesized under hydrothermal conditions, and their magnetic behaviors have been discussed in detail.

Fluorescence sensing and magnetic properties of three coordination polymers based on 6-(3,5-dicarboxylphenyl)nicotinic acid and pyridine/imidazole linkers

2019 ◽  
Vol 43 (24) ◽  
pp. 9376-9383 ◽  
Author(s):  
Jie Zhang ◽  
Lingling Gao ◽  
Yang Wang ◽  
Lijun Zhai ◽  
Xiaoqing Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Nicotinic Acid ◽  
Coordination Polymers ◽  
Fluorescence Properties ◽  
Fluorescence Sensing ◽  
Hydrothermal Conditions

Three new coordination polymers (CPs) have been synthesized under hydrothermal conditions. Furthermore, the magnetic properties of 1 and 2 and the fluorescence properties of 3 were also investigated.

The Influence of Diamagnetic Substrates Absorption on Magnetic Properties of Porous Coordination Polymers

2013 ◽  
Vol 3 (2) ◽  
pp. 144-160 ◽  
Author(s):  
Sergey Kolotilov ◽  
Mikhail Kiskin ◽  
Igor Eremenko ◽  
Vladimir Novotortsev
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Porous Coordination Polymers

Single crystal to single crystal transformation of spin-crossover coordination polymers from 3D frameworks to 2D layers

2021 ◽  
Vol 9 (15) ◽  
pp. 5082-5087
Author(s):  
Yu Gong ◽  
Wang-Kang Han ◽  
Hui-Shu Lu ◽  
Qing-Tao Hu ◽  
Huan Tu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Ligand Exchange ◽  
Spin Crossover ◽  
Metal Organic Frameworks ◽  
Crystal Transformation ◽  
Metal Organic

New Hofmann-type metal–organic frameworks display rare and complete ligand exchange induced single crystal to single crystal transformations from 3D frameworks to 2D layers, accompanied by magnetic properties transition from two-step SCO behavior to hysteretic SCO behavior.

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