Sequential electron transfer in a bis(styryl)BODIPY-aluminum(III) porphyrin – naphthalenediimide reaction center mimic

Author:

Zarrabi Niloofar1,Holzer Noah1,Lim Gary N.2,Obondi Christopher O.2,van der Est Art3,D’Souza Francis2,Poddutoori Prashanth K.1

Affiliation:

1. Department of Chemistry and Biochemistry, University of Minnesota Duluth, 1038 University Drive, Duluth, MN, 55812, USA

2. Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, USA

3. Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines Ont., Canada L2S 3A1, Canada

Abstract

Photoinduced electron transfer properties are reported for a triad composed of a central aluminum(III) porphyrin (AlPorF[Formula: see text] with a secondary electron donor, bis-triphenylaminoborondipyrromethene (TPA2-BDP) attached covalently to AlPorF3, and an electron acceptor, pyridine-appended naphthalenediimide (NDI), attached by coordination of the pyridine group to the AlPor on the opposite face. Excitation of either the AlPorF3 or BDP-TPA2 in the triad results in a two-step electron transfer leading to (TPA2-BDP)[Formula: see text]-AlPorF3-NDI[Formula: see text] as the final charge-separated species. The electron transfer is investigated using the steady-state fluorescence spectroscopy and time-resolved EPR spectroscopy. The behavior of the triad is compared to that of a previously reported triad in which the NDI acceptor was replaced with C[Formula: see text]. The two triads have virtually identical energetics, but the reorganization energies of the acceptors are known to be very different. The spectroscopic data show that the final charge-separated state is formed in both triads despite the large difference in the reorganization energy associated with the acceptors. This suggests that the ability to perform sequential electron transfer does not depend strongly on the properties of the final acceptor, provided that secondary electron transfer can outcompete recombination in the initial charge-separated state.

Funder

University of Minnesota Duluth

National Science Foundation

NSERC Discovery

Publisher

World Scientific Pub Co Pte Ltd

Subject

General Chemistry

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3