ABSTRACT
Correction for 'A photochromic zinc-based coordination polymer for a Li-ion battery anode with high capacity and stable cycling stability' by Shu-Biao Xia et al., Dalton Trans., 2018, 47, 13222-13228, DOI: 10.1039/C8DT02930J.
ABSTRACT
Correction for 'Naphthalimide-containing coordination polymer with mechanoresponsive luminescence and excellent metal ion sensing properties' by Jian-Jun Liu et al., Dalton Trans., 2020, 49, 3174-3180, DOI: 10.1039/C9DT04928B.
ABSTRACT
Mechanoresponsive luminescent materials coupled with other functionalities are of particular interest due to their multiple external stimuli responsive properties. In this paper, a new sensitive mechanoresponsive luminescent coordination polymer, [Cd(INI)(DMF)2·DMF] (1) (H2INI = N-(5-isophthalic acid)-1,8-naphthalimide), has been successfully designed and synthesized. Complex 1 exhibits interesting mechanoresponsive and grinding-enhanced luminescence properties, and its luminescence colour changed from weak blue-green to bright blue upon grinding owing to the external pressure-induced destruction of ππ stacked arrangements in local defective areas. Moreover, the luminescence properties and uncoordinated carbonyl groups of well-ground g-1 endow it with excellent sensing ability for Cr3+ ions. This work will provide a new perspective to rationally design multifunctional coordination polymers that can serve as practical multi-responsive sensors to pressure and chemicals.
ABSTRACT
Rechargeable Li-ion batteries (LIBs) are currently the dominant power source for electric vehicles and portable electronic devices, and for small-scale stationary energy storage. However, one bottleneck of the anode materials for LIBs is the poor cycling performance caused by the fact that the anodes cannot maintain their integrity over several charge-discharge cycles. In this article, a zinc-based two-dimensional coordination polymer [Zn(bcbpy)0.5(PTA)(H2O)] (Zn-BCP) has been synthesized (H2bcbpy·2Cl = 1,1'-bis(3-carboxylatobenzyl)-(4,4'-bipyridinium) dichloride, PTA = terephthalic acid), which was characterized by single-crystal X-ray diffraction, powder X-ray diffraction, infrared spectroscopy and thermogravimetric analysis. Because of the presence of electron-deficient bipyridinium moieties, Zn-BCP can easily undergo photoinduced electron transfer and eye-detectable photochromic behavior. Moreover, its luminescence can be switched by UV-Vis light irradiation. When Zn-BCP acts as an anode material for lithium ion batteries, it can deliver a high reversible capacity of 386.2 mA h g-1 at 100 mA g-1 after 100 cycles and a high capacity retention of 93.1% after 1000 cycles at a high rate of 200 mA g-1, which is supposed to be due to the flexible structure characteristic of the proposed anode. The high capacity may be mainly ascribed to rich insertion sites arising from the aromatic ligands and all of the aromatic ligands are taking part in lithium storage.
ABSTRACT
Naphthalenediimides, a class of organic dyes with an expanded π-electron-deficient plane, have attracted considerable interest because of their photoinduced electron transfer from neutral organic moieties to stable anionic radicals. This makes them excellent candidates for organic linkers in the construction of photochromic coordination polymers. Such a photochromic two-dimensional coordination polymer has been prepared using N,N'-bis(pyridin-4-ylmethyl)naphthalene-1,8:4,5-bis(dicarboximide) (DPMNI). In crystallization tubes, upon slow diffusion of an MeOH solution of cadmium perchlorate into a CHCl3 solution of DPMNI, the complex poly[[bis[µ2-2,7-bis(pyridin-4-ylmethyl)benzo[imn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone-κ2N:N']bis(perchlorato-κO)cadmium(II)] chloroform tetrasolvate], {[Cd(C26H16N4O4)2(ClO4)2]·4CHCl3}n, (I), was obtained. The asymmetric unit contains one Cd2+ cation, two DPMNI ligands, two coordinated ClO4- anions and four CHCl3 solvent molecules. Each Cd2+ cation is interconnected by four DPMNI linkers to generate a neutral two-dimensional naphthalenediimide coordination network with all the ClO4- anions above or below this plane. Strong interlaminar anion-π interactions between the coordinated ClO4- anions and the imide rings of an adjacent layer lead to a three-dimensional supramolecular structure. Compound (I) exhibits reversible photochromic behaviour and photocontrolled tunable luminescence properties, which may originate from the photoinduced electron-transfer generation of radicals in the DPMNI ligand.
ABSTRACT
Three new cadmium coordination polymers, namely [Cd(NO3)2(DPNDI)(CH3OH)]·CH3OH (1), [Cd(SCN)2(DPNDI)] (2), and [Cd(DPNDI)2(DMF)2]·2ClO4 (3) (DPNDI = N,N-di(4-pyridyl)-1,4,5,8-naphthalene diimide, DMF = N,N-dimethylformamide) have been synthesized by reactions of DPNDI with Cd(NO3)2, Cd(SCN)2, and Cd(ClO4)2, respectively. Compound 1 is a one-dimensional coordination polymer with strong lone pair-π interactions between the coordinated NO3- anions and the imide ring of DPNDI; while 2 is a two-dimensional network with a (4, 4) net topology. In the case of 3, due to the presence of uncoordinated perchlorate counter ions, it exhibits a non-interpenetrated square-grid coordination polymer containing one-dimensional rhomboid channels. The structural diversity in these compounds is attributed to different coordination abilities and geometries of counter anions. Due to the presence of electron-deficient NDI moiety, the photochromic behavior of these compounds was studied. Interestingly, only compounds 1 and 3 exhibit color changes under light irradiation. The influence of the anions on the photochromism process of the NDI-based materials has been discussed.
