Photophysics of Mono-Disperse Metal-Organic Oligomers

单分散金属有机低聚物的光物理学

基本信息

批准号：
9901861
负责人：
Kirk Schanze
金额：
$ 31.5万
依托单位：
University of Florida
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-07-01 至 2002-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9901861&HistoricalAwards=false
关键词：
Photophysics Mono Disperse Metal Organic

项目摘要

This grant in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research on the optical properties of metal-organic pi-conjugated polymers by Dr. Kirk S. Schanze of the Department of Chemistry, University of Florida. The photophysical properties of several homologous series of mono-disperse, metal-organic pi-conjugated oligomers will be determined as models for higher molecular weight polymeric counterparts. The specifc compounds to be studied are mono-disperse phenyleneethynylene and phenylenevinylene type oligomers that contain bipyridine units that can bind a variety of transition metal ions, particularly rhenium (I) and ruthenium (II). Low-lying metal to ligand charge transfer (MLCT) excited states delocalized over the entire oligomer are observed in these compounds. In addition to the impact of the metal center on optical properties, the effects of oligomer topology, conjugation length and bandgap on the properties of the MLCT excited states will be investigated. Some platinum-acetylide oligomers will also be studied. Photophysical investigation will utilize absorption, photoluminescence, photoinduced absorption, transient FT-IR and FT-EPR spectroscopies and photoacoustic calorimetry.Metal-organic polymers exhibit properties that are a combination of those expected for the metal and organic components. For this reason, they have potential for use in electronic devices that require electrochromism or photorefractivity or in specific detection of metal ions. Graduate and undergraduate students involved in this project will gain experience in many synthetic techniques and use of sophisticated instrumentation.

这项在无机，生物启示和有机金属化学计划中的这项赠款支持了佛罗里达大学化学系的Kirk S. Schanze博士的金属有机PI结合聚合物的光学性质。几个同源系列单分散的金属有机PI偶联的低聚物的光物理特性将被确定为高分子量聚合物对应物的模型。要研究的指定化合物是单分散的苯二烯乙烯烯和苯乙烯型低聚物，其中包含双吡啶单元，它们可以结合多种过渡金属离子，尤其是rhenium（i）和ruthenium（ii）。在这些化合物中观察到了在整个低聚物上被脱落的低洼金属到配体电荷转移（MLCT）激发态。除了金属中心对光学性质的影响外，还将研究低聚物拓扑，结合长度和带隙对MLCT激发态性质的影响。还将研究一些铂 - 乙酰基寡聚物。光物理研究将利用吸收，光致发光，光诱导的吸收，瞬态FT-IR和FT-EPR光谱以及光声钙钙仪。中的有机聚合物具有特性，这些特性是金属和有机成分预期的组合。因此，它们有可能在需要电染色或光质性或特定检测金属离子的电子设备中使用。参与该项目的研究生和本科生将获得许多合成技术的经验以及精致的仪器的使用。