Dynamic Vapochromic Behaviors of Organic Crystals Based on the Open-Close Motions of S-Shaped Donor-Acceptor Folding Units
作者:Eiji Takahashi、Hikaru Takaya、Takeshi Naota
DOI:10.1002/chem.200903403
日期:2010.4.26
The first vapochromic organic crystals are described with respect to their preparation, color change, adsorption/desorption properties, crystal structures, and color‐change mechanism. Non‐solvatochromic, 1,4,5,8‐naphthalene‐tetracarboxylic diimide (NDI) derivatives 1 a bearing two pyrrole imine (PI) tethers have been used as a motif for the crystal packing template. Red‐purple vapochromic solid 3 was
首先描述了气相致变色有机晶体的制备,颜色变化,吸附/解吸特性,晶体结构和颜色变化机理。带有两个吡咯亚胺(PI)系链的非溶剂变色,1,4,5,8-萘-四甲酸二亚胺(NDI)衍生物1a已用作晶体包装模板的图案。抽空橙色晶体2(相当于1 a⋅2 MeOH)制得红紫色的气相致变色固体3,该晶体是从MeOH中重结晶1 a得到的。固体3暴露于各种有机蒸气中时显示出高吸附能力和前所未有的与蒸气有关的颜色变化,而浅棕色无定形固体1 a对任何有机溶剂均未表现出气相或溶剂变色行为。TGA实验和吸附/解吸等温线证实了3的强吸附能力。/ Vis分析固态UV分析表明,的蒸气依赖性颜色变化3在被欠以其广泛的CT吸光度溶剂蒸气的特定干扰λ = 450-650纳米。1 a在橙色晶体2中的填充结构,红紫色固体3和再生的橙色固体2分别通过单晶和同步加速器粉末X射线衍射确定。这些材料中1 a的分子结构和阵列表明1)单元1 a在