Palladium catalyzed Stille coupling reactions are extensively used for the preparation of functionalised thiophene based polymers. In addition, polycondensation via direct C-H arylation produces alternating copolymers in moderate yields. In the present work, we report the synthesis and optoelectronic properties of thiophene based compounds having rigid cycloalkanone and a novel hexhydro-2H-indazole spacers in between. X-ray diffraction analysis shows the semi-crystalline nature of the synthesized materials with extensive side chain crystallinity. Band-gap energy of the synthesized materials has been obtained experimentally via optical and electrochemical methods and theoretically via computational studies. Open aperture Z-Scan results confirm the competence of these materials as optical limiters (NLO) while the photoluminescence emission characteristics and Schottky diode characteristics indicate their application prospects in Polymer Light Emitting Diodes (PLEDs). Polymers having hexhydro-2H-indazole spacers appear to be promising candidates for optoelectronic applications.

钯催化的斯蒂勒偶联反应被广泛用于制备官能化的噻吩基聚合物。此外，通过直接CH芳基化的缩聚反应可产生中等收率的交替共聚物。在本工作中，我们报告了具有刚性环烷酮和新型hexhydro-2 H的噻吩基化合物的合成和光电性能-吲唑间隔基之间。X射线衍射分析显示了具有宽侧链结晶度的合成材料的半结晶性质。合成材料的带隙能已通过光学和电化学方法实验获得，理论上通过计算研究获得。开孔Z扫描结果证实了这些材料具有光学限制器（NLO）的能力，而光致发光发射特性和肖特基二极管特性则表明了它们在聚合物发光二极管（PLED）中的应用前景。具有六氢-2 H-吲唑间隔基的聚合物似乎是光电子应用的有前途的候选者。