Zhao Dahui, Moore Jeffrey S
Department of Chemistry, University of Illinois, Urbana 61801, USA.
J Am Chem Soc. 2002 Aug 28;124(34):9996-7. doi: 10.1021/ja026957e.
Bisfunctionalized m-phenylene ethynylene imine oligomers were polymerized in the polar solvent acetonitrile, resulting in high-molecular weight poly(m-phenylene ethynylene imine)s. It is hypothesized that this polymerization, which proceeds through the reversible metathesis of imine bonds, is driven by the folding of the long m-phenylene ethynylene imine chains. Upon conducting the polymerization in a series of solvents in which the m-phenylene ethynylene oligomers exhibit different folding stabilities, it was possible to correlate the molecular weight of the resulting poly(m-phenylene ethynylene imine)s with the helical stability of the corresponding oligomers. The polymerization was also demonstrated to be reversible and responsive to solvent and temperature changes.
双官能化间亚苯基乙炔基亚胺低聚物在极性溶剂乙腈中聚合，生成高分子量的聚间亚苯基乙炔基亚胺。据推测，这种通过亚胺键可逆复分解进行的聚合反应是由长链间亚苯基乙炔基亚胺链的折叠驱动的。在一系列间亚苯基乙炔基低聚物表现出不同折叠稳定性的溶剂中进行聚合反应时，有可能将所得聚间亚苯基乙炔基亚胺的分子量与相应低聚物的螺旋稳定性相关联。该聚合反应还被证明是可逆的，并且对溶剂和温度变化有响应。
