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Design, Synthesis, and Applications of Pyrazabole Functionalized Derivatives
Nikhil Ji Tiwari1, Kushagra Pratap Rana1, Rajneesh Misra1
1Department of Chemistry, Indian Institute of Technology Indore, Indore, India.
None:
Pyrazabole derivatives are widely used in liquid crystalline materials, ion sensing, multi-photon absorption, mechanochromism, luminescent polymers, and many more. The tetra-coordinate boron centers in pyrazabole exert a mild inductive electron-withdrawing effect, which modulates the electronic distribution and facilitates charge delocalization across the conjugated framework. The functionalization of pyrazabole with various donor and acceptor groups in both small molecules and polymeric frameworks has been extensively explored to optimize their optoelectronic properties. The review explores the design strategies for novel pyrazabole derivatives, focusing on fine-tuning of photophysical and electrochemical properties and advancements in the synthesis and functionalization of pyrazabole-based small organic molecules and polymers. The conformational flexibility of the pyrazabole unit allows it to adopt both planar and non-planar geometries, influencing the overall molecular architecture of the derivatives. In certain cases, this flexibility induces a distinctive bent arrangement depending on the substitution pattern and steric environment. This review highlights new avenues for innovative applications and advancements across various scientific domains, offering valuable insights into their potential contributions to ongoing research endeavors.
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