Synthesis of Conjugated Hyperbranched Polytriazoles Containing Truxene Units by Click Polymerization

• Published in: Chinese journal of chemistry Vol. 30; no. 4; pp. 861 - 868
• Main Author: 李冬至 王欣 贾玉涛 王爱卿 武永刚
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.04.2012; WILEY‐VCH Verlag; Wiley; Wiley Subscription Services, Inc
• Subjects: "click" polymerization; aggregation; Chemistry; Chemistry, Multidisciplinary; hyperbranched; Physical Sciences; Science & Technology; 共轭; 单位; 合成; 差示扫描量热法; 水溶性; 聚合过程; 超支化; 超高分子量; AZIDE-ALKYNE CYCLOADDITION; hyperbranched; CROSS-LINKED NANOPARTICLES; aggregation; ADHESIVE POLYMERS; 1,3-DIPOLAR CYCLOADDITION; AB MONOMERS; RADICAL POLYMERIZATION; "click" polymerization; DENDRONIZED LINEAR-POLYMERS; CONVERGENT SYNTHESIS; COPPER(I) CATALYSIS; TRIAZOLE DENDRIMERS
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.201100339

It has been a challenge to synthesize high molecular weight and soluble conjugated hyperbranched poly（1,2,3-triazole）s （hb-PTAs）. In this paper a series of soluble hyperbranched polytriazoles, whose num- ber-average molecular weight （Mn） and polydispersity index ranged in （1.2--3.3）× 104 and 1.7--3.0, respectively, were synthesized with A2 d-B3 approach. In the polymerization process, diazides A1--A4 and triyne B1 were used as A2 and B3 monomers; Cu（I）-catalyst, THF and water were used as their reaction system. At room temperature the final molecular weight could be controlled through reaction time, so finally we obtained soluble conjugated hyper- branched poly（1,2,3-triazole）s hb-PTAs （1--4）. The polymers were soluble in common organic solvents, and all emitted blue light; the films of polymers emitted yellow and blue light, due to the difference in the aggregation of their chromophoric units in the solid state. The thermal properties of the final copolymers were analyzed by differ- ential scanning calorimetry （DSC） and thermogravimetric analysis （TGA）.