Metal‐Ligand Interactions and Oligo(p‐phenylene vinylene) Derivatives Based Supramolecular Polymer Possessing Variable Fluorescence Colors

Abstract

Fluorescent supramolecular polymers combine the benefits of supramolecular polymers in terms of dynamic nature with the optoelectronic features of incorporated fluorophores. However, the majority of fluorescent supramolecular polymers can only exhibit a single fluorescent state, restricting their applications. Incorporating J‐type dyes into supramolecular monomers is expected to impart supramolecular polymers with variable fluorescence colors, because the aggregation mode of J‐type dyes is closely related to the formation of supramolecular polymers. Herein, the authors report a supramolecular polymer [M1·Zn(OTf)2]n, in which the monomer M1 contains a J‐type dye, oligo(p‐phenylene vinylene) derivative, and two terpyridine ends. The M1 + Zn(OTf)2 solutions exhibit fluorescence color changes varying from cyan to yellow‐green in the monomer concentration ranging from 0.04 to 1.00 mm. Moreover, based on the outputs from laser scanning confocal microscopy, the fluorescence color transition during the formation of supramolecular polymers is intuitively proven. Additionally, considering the close relationship between the supramolecular polymer structure and the fluorescence color, the fluorescence color can be regulated by introducing tetraethylammonium hydroxide that can bind with Zn2+ competitively to break up the structure of the supramolecular polymer.

Multi-color supramolecular assemblies constructed based on single molecule fluorophore

“…图 4 超分子单体M3的化学结构以及荧光颜色随单体浓度 的增加而变化的示意图 [54] (网络版彩图) 图 5 聚合物链P1的化学结构以及其交联成超分子聚合物 网络的过程以及荧光颜色随P1溶液浓度增加而变化的示意 图 [55] (网络版彩图) 图 6 M4和P2的化学结构, 以及随着混合溶液中P2和M4浓 度增加交联过程和荧光颜色变化的示意图 [56] (网络版彩图) 通表示, 即P3-1、P3-2、P3-3, 其应用于(i) 信息代码模式, (ii) 仿生模式, (iii) 数据模式 [57] (网络版彩图)…”

Synthesis and Polymerization of an ortho-para-Substituted Tetraalkoxy [2.2]Paracyclophane-1,9-diene

“…Poly­( p -phenylenevinylene) (PPV), a π-conjugated conductive polymer, has potential applications in polymer electronics and as optoelectronic materials . PPVs have been used as the emissive layer in an organic light-emitting diode (OLED) in 1990 with more recent applications of PPVs and its oligomers as chemical and biological sensors, for fluorescent imaging, and as building blocks in supramolecular polymers. − When unsubstituted, PPV, a rigid-rod polymer, is insoluble . Alkoxy side-chains can be appended to the benzene repeat units in the backbone to improve solubility but they inherently influence the optical properties of the final polymer.…”