Photoinduced Excited-State Energy-Transfer Dynamics of a Nitrogen-Cored Symmetric Dendrimer: From the Perspective of the Jahn-Teller Effect

doi:10.1021/jp512496z

QIBEBT-IR > 蛋白质设计研究组

	Photoinduced Excited-State Energy-Transfer Dynamics of a Nitrogen-Cored Symmetric Dendrimer: From the Perspective of the Jahn-Teller Effect
	Huang, Jing 1,2,3; Du, Likai1,2,3 ; Wang, Jun1,2,3 ; Lan, Zhenggang 1,2,3
	2015-04-09
发表期刊	JOURNAL OF PHYSICAL CHEMISTRY C
卷号	119 期号:14 页码:7578-7589
摘要	We report an interesting view to understand the ultrafast excited-state energy-transfer (EET) process in the D-3-symmetric dendrimer tris(4-ethynylphenyl)amine (TEPA) from the perspective of the well-known E circle times e Jahn-Teller (JT) effect. Upon excitation to two lowest excited states (S-1 and S-2) with doubly degenerate E symmetry, two sets of e vibrational modes, dihedral angle twist and strong pyramidalization near the nitrogen core, lead to the JT distortion and symmetry lowering. Through the excited-state dynamics simulation with the on-the-fly surface-hopping approach at the TDDFT level, we find that the system may either travel three equivalent minima of S-1 state or undergo the nonadiabatic transitions between S-1 and S-2 states. These motions induce the ultrafast EET among different branches and the reorientation of the transition dipole moments, finally leading to the ultrafast fluorescence anisotropy decay. This energy-transfer mechanism can provide some interesting insights on the excited-state dynamics of large dendrimers with three equivalent branches and transition metal complexes with C-3 symmetry.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences ; Technology
DOI	10.1021/jp512496z
关键词[WOS]	SHAPED OLIGOFLUORENE-TRUXENE ; ENHANCED 2-PHOTON ABSORPTION ; CHARGE-TRANSFER INTERACTIONS ; TIME-RESOLVED SPECTROSCOPY ; MOLECULAR-DYNAMICS ; PHENYLACETYLENE DENDRIMERS ; MULTIBRANCHED STRUCTURES ; POLARIZATION ANISOTROPY ; FLUORESCENCE ANISOTROPY ; CONICAL INTERSECTIONS
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000352823300004
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/6437
专题	蛋白质设计研究组
作者单位	1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biobased Mat, Qingdao 266101, Shandong, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Key Lab Solar Energy Utilizat & Energy St, Qingdao 266101, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Jing,Du, Likai,Wang, Jun,et al. Photoinduced Excited-State Energy-Transfer Dynamics of a Nitrogen-Cored Symmetric Dendrimer: From the Perspective of the Jahn-Teller Effect[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(14):7578-7589.
APA	Huang, Jing,Du, Likai,Wang, Jun,&Lan, Zhenggang.(2015).Photoinduced Excited-State Energy-Transfer Dynamics of a Nitrogen-Cored Symmetric Dendrimer: From the Perspective of the Jahn-Teller Effect.JOURNAL OF PHYSICAL CHEMISTRY C,119(14),7578-7589.
MLA	Huang, Jing,et al."Photoinduced Excited-State Energy-Transfer Dynamics of a Nitrogen-Cored Symmetric Dendrimer: From the Perspective of the Jahn-Teller Effect".JOURNAL OF PHYSICAL CHEMISTRY C 119.14(2015):7578-7589.