CAS: ENFORCING EXCITED STATE REACTIVITY BY ALTERING CHROMOPHORE CHARACTERISTICS

有了这个奖项，化学部的化学结构，动力学和机制-B计划支持了俄亥俄州保龄绿色州立大学（BGSU）的Jayaraman Sivaguru教授和他的学生的基础研究。Sivaguru集团利用光的力量来创造可持续的战略，以进行新的化学转化。他们开发新的模型来理解基本方面并控制光诱导反应。总体目标是以节能和可持续的方式构建复杂的分子结构。 该项目整合了教学和学习的研究和学术目标，以帮助学生获得实验和智力能力。该计划的更广泛影响包括俄亥俄州西北部的高中生通过一个名为PICNICS（父母参与儿童，培养科学知识）的外展计划进行的研究。该项目为当地高中三年级和四年级学生提供暑期实习机会。这使学生能够直接了解最新的科学进展，并获得在BGSU光化学科学中心前沿研究环境中工作的经验。该研究计划开发了指导激发态反应，发现新的光化学反应性，并通过改变发色团的正常特性实现反应选择性的策略。 反应性发色团的电子特性通过内部取代或通过外部添加剂如刘易斯酸来改变。 这项工作的目的是揭示新的光化学途径和反应，在传统系统中没有观察到。该研究旨在了解分子激发态和短寿命中间体的反应性，选择性，动力学和寿命之间的微妙平衡。一个目标是使用改变的发色团特性创建与光化学和光物理事件相关的新范例。拟议研究的结果提供了一个平台，以节能和可持续的方式构建具有预定义配置的复杂分子。这些结果对与光科学相关的基本概念产生了重大影响，并广泛影响了合成，材料科学，有机光电子学，催化和环境科学等领域。这项研究为学生培训和将研究纳入公共外展计划提供了机会。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

With this award, the Chemical Structure, Dynamics and Mechanism-B program in the Division of Chemistry supports the fundamental research of Professor Jayaraman Sivaguru and his students at Bowling Green State University (BGSU) in Ohio. The Sivaguru group harnesses the power of light to create sustainable strategies for carrying out new chemical transformations. They develop new models to understand the fundamental aspects and to control light–induced reactivity. The overarching goal is to build complex molecular structures in an energy efficient and sustainable fashion. This project integrates the research and academic goals of teaching and learning to help students gain experimental and intellectual competence. The broader impacts of the program include research by high school students in northwest Ohio through an outreach program called PICNICS (Parents Involvement with Children, Nurturing Intellectual Curiosity in Science). This program provides summer internships for local high school juniors and seniors. This enables the students to learn first-hand about recent advancements in science, and to gain experience working in a cutting-edge research environment in BGSU’s Center for Photochemical Sciences.The research plan develops strategies for directing excited state reactivity, uncovering new photochemical reactivity, and achieving reaction selectivity by altering the normal characteristics of chromophores. The electronic characteristics of reactive chromophores are modified either by internal substitution or through external additives such as Lewis acids. This work is designed to reveal new photochemical pathways and reactivity that are not observed in conventional systems. The research seeks to understand the delicate balance between reactivity, selectivity, dynamics, and lifetimes of molecular excited state and short-lived intermediates. One goal is to create new paradigms related to photochemical and photophysical events using altered chromophore characteristics. The outcome of the proposed investigations provides a platform to build complex molecules with pre-defined configurations, in an energy efficient and sustainable fashion. The results have a significant impact on basic concepts related to the photosciences and broadly influence the fields of synthesis, materials science, organic optoelectronics, catalysis and environmental science. This research provides opportunities for student training and integration of research in public outreach programs.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.