具有光致变色行为的联吡啶鎓基Zn(Ⅱ)配位聚合物
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- 英文论文题名：Photochromism of Zn(Ⅱ) coordination polymer based on the bipyridinium unit
- 论文作者：杨晓冬 ; 陈城 ; 张亚军 ; 张杰
- 英文论文作者：Xiaodong Yang ; Cheng Chen ; Yajun Zhang ; Jie Zhang ; Fujian Institute of Research on the Structure of Matter ; School of Chemistry ; Beijing Institute of Technology
- 年：2016
- 作者机构：中国科学院福建物质结构研究所;北京理工大学化学学院;
- 论文关键词：配位聚合物 ; 光致变色 ; 自由基
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
- 语种：中文
- 分类号：O634
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：241k
- 原文格式：D
- 会议级别：全国
摘要
光致变色材料由于其潜在的应用价值越来越受到科学家们的青睐1。我们利用二溴化-1,2-二(4,4′-联吡啶基)乙烷(Bpyen Br_2)、对苯二甲酸(p-H_2BDC)和Zn(NO_3)_2·6H_2O组装得到了一例具有光致变色性能的配位聚合物[Zn_(1.5)(Bpyen)_(0.5)(p-BDC)_2(H_2O)_5]。X-射线晶体数据表明该化合物结晶于单斜晶系,P-1空间群。在氙灯照射下,该化合物由淡黄色变为绿色。随着光照时间的增加,该化合物的紫外-可见漫反射光谱在400nm和660nm处出现较强的吸收峰,同时,其电子自旋共振光谱在g=2.0032处出现较强的顺磁信号,这些数据表明该化合物发生光致变色的原因是Bpyen~(2+)配体被还原成Bpyen·~+自由基。
Photochromic materials have received great scientific attention due to their potential applications in a wide range of fields1. The reaction of Bpyen Br_2, p-H_2 BDC and Zn(NO_3)_2·6H_2O yields a novel coordination polymer [Zn_(1.5)(Bpyen)_(0.5)(p-BDC)_2(H_2O)_5]. The X-ray single-crystal diffraction analysis reveals that this compound crystallizes in the monoclinic space group P-1. This compound can show an eye-detectable photochromic transformation from faint yellow to green in response to the irradiation of xenon lamp. The UV-vis diffuse reflectance spectra of the photoproduct display two characteristic bands centered at 400 nm and 660 nm, and the ESR spectrum shows a strong signal at g = 2.0032, indicating that Bpyen~(2+) ligands are reduced to Bpyen·~+ free radicals upon light irradiation to cause the color change of this compound.
Photochromic materials have received great scientific attention due to their potential applications in a wide range of fields1. The reaction of Bpyen Br_2, p-H_2 BDC and Zn(NO_3)_2·6H_2O yields a novel coordination polymer [Zn_(1.5)(Bpyen)_(0.5)(p-BDC)_2(H_2O)_5]. The X-ray single-crystal diffraction analysis reveals that this compound crystallizes in the monoclinic space group P-1. This compound can show an eye-detectable photochromic transformation from faint yellow to green in response to the irradiation of xenon lamp. The UV-vis diffuse reflectance spectra of the photoproduct display two characteristic bands centered at 400 nm and 660 nm, and the ESR spectrum shows a strong signal at g = 2.0032, indicating that Bpyen~(2+) ligands are reduced to Bpyen·~+ free radicals upon light irradiation to cause the color change of this compound.
引文
[1]X.-H.Jin,J.-K.Sun,X.-M.Xu,Z.-H.Li,and J.Zhang,Chem.Commun.,2010,46,4695-4697.