Coordination Chemistry Reviews ( IF 20.3 ) Pub Date : 2022-07-08 , DOI: 10.1016/j.ccr.2022.214698 Priksha Rana , Nishi Singh , Poulomi Majumdar , Surya Prakash Singh
Over the past few decades, photocatalysis has been established as a rapidly escalating research area to catalyse the chemical reactions induced by visible light through single electron transfer (SET) and energy transfer (EnT) processes between a photocatalyst and an organic substrate. The conventional photocatalysts such as transition metal catalysts used for organic synthetic transformations face some drawbacks such as weak visible light absorbance, expensive, potentially toxic, and difficult to synthesize. As well as organic photocatalysts, for instance, xanthene dyes like Eosin Y and Rose Bengal exhibit inefficiency to harvest the broadband light source, difficulty to modify the molecular structure, as a result of which the redox potentials of the photocatalysts cannot be readily tuned with different substrates. Photoredox/energy transfer catalysis is the capable embodiment for tomorrow’s synthetic research and hence, there is a dire need to overcome the limitations and to develop highly efficient photocatalysts that promote the sustainable energy, and interestingly BODIPY falls in that category. Being the most versatile and widely discussed organic fluorophore, BODIPY has considerable impact on different fields such as fluorescence imaging, photodynamic theory, functionalized materials, optoelectronics and has majorly influenced the field of organic synthesis by its most dynamic property as a photosensitizer. This review article widely discusses the application of the BODIPY/aza-BODIPY dye as a photocatalyst for photoredox/energy transfer catalytic organic reactions to produce simple to highly functionalized organic molecules. BODIPY molecule displays highly desirable chemical and physical properties such as high absorbance in the visible region, remarkable thermal and photochemical stabilities, high fluorescence quantum yield, and modularity, making it the more efficient photocatalyst over the popular conventional photocatalysts. In addition, green/NIR light-absorbing BODIPY photocatalysts with long-lived triplet excited state are utilized to elevate SET and EnT processes for selective photocatalysis under mild condition. This review presents a broad perspective of BODIPY/aza-BODIPY based photocatalysts in synthetic organic transformation and its significant advances over other conventional dyes.
中文翻译:
用于有机光氧化还原/能量转移催化的 BODIPY/aza-BODIPY 染料的演变
在过去的几十年里,光催化作为一个快速升级的研究领域,通过单电子转移(SET)和能量转移( EnT)催化可见光诱导的化学反应。) 光催化剂和有机底物之间的过程。用于有机合成转化的传统光催化剂如过渡金属催化剂面临着可见光吸收弱、价格昂贵、潜在毒性大、合成困难等缺点。与有机光催化剂一样,例如伊红 Y 和玫瑰红等呫吨染料在获取宽带光源方面表现出低效率,难以改变分子结构,因此光催化剂的氧化还原电位不能轻易地用不同的方法调节。基板。光氧化还原/能量转移催化是未来合成研究的有力体现,因此,迫切需要克服限制并开发促进可持续能源的高效光催化剂,有趣的是,BODIPY 属于这一类。作为用途最广泛、讨论最广泛的有机荧光团,BODIPY 对荧光成像、光动力学理论、功能化材料、光电子学等不同领域产生了相当大的影响,并以其作为光敏剂的最具动态特性对有机合成领域产生了重大影响。这篇综述文章广泛讨论了 BODIPY/aza-BODIPY 染料作为光催化剂在光氧化还原/能量转移催化有机反应中的应用,以产生简单到高度功能化的有机分子。BODIPY 分子显示出非常理想的化学和物理特性,例如在可见光区域的高吸光度、显着的热和光化学稳定性、高荧光量子产率和模块化,使其成为比流行的传统光催化剂更有效的光催化剂。此外,利用具有长寿命三重激发态的绿色/近红外光吸收 BODIPY 光催化剂来提高 SET 和在温和条件下进行选择性光催化的EnT工艺。这篇综述介绍了基于 BODIPY/aza-BODIPY 的光催化剂在合成有机转化中的广阔前景,以及它相对于其他传统染料的显着进步。