Synthesis And Materialization Of Osmapentalenes

Osmapentalene is a unique metallaaromtic that can be used to construct a series of osmapentalene derivatives and biological,optoelectronic materials owing to its excellent reactivity and unique optical properties.The introduction of functional metal components into the polymer skeleton can lead to unique metal-containing polymer.This paper aimed at the functionalization and materialization of osmapentalene,investigated the reactivity to construct a series of osmapentalene and osmapentalene derivatives,and studied the functionalization of osmapentalene to prepare multifunctional materials.The dissertation consists of the following five chapters:In chapter 1,the chemistry of metallapentalynes,metallapentalenes and their derivatives,metal-containing polymer,near-infrared absorbing materials were summarized.The research objectives and plan of this dissertation are presented.In chapter 2,the reaction mechanism between osmapentalenes and alkyne were investigated,a new method to prepare functional osmapentalenes and and its derivatives step by step was established,two new C(?3-allyl)coordinated osmapentalene and ?-agostic osmapentalene were found.These studies enrich the chemistry of osmapentalene,and expand the application of osmapentalene.In chapter 3,pH/temperature-responsive/targeted photothermal material was prepared.The photothermal materials exhibits excellent water-solubility and good photothermal conversion efficiency.The photothermal materials self-assembled into micellar nanoparticles with diameters of ca.177 nm in PBS solution,which exhibited high stability,water-dispersibility,biocompatibility and expected to apply in synergistic photothermal/chemo-therapy.In chapter 4,osmapentalenes-containing polymethylacrylic acid was prepared,the graft ratio controllable.The study of the properties for the materials show that the material exhibited strong absorption in the visible-near infrared region and excellent photothermal conversion efficiency.The material self-assembled into dispersed,uniform micellar nanoparticles with diameters of ca.80 nm in PBS,showing potential application prospects in the field of biological and optoelectronic materials.In chapter 5,the summary of this dissertation was concluded and the prospect of this research was also presented.