Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid

被引：31

作者：

Lockard, Jenny V. ^{[1
]}

Wasielewski, Michael R. ^{[1
]}

机构：

[1] Northwestern Univ, Argonne Northwestern Solar Energy Res Ctr, Dept Chem, Evanston, IL 60208 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2007年 / 111卷 / 40期

关键词：

D O I：

10.1021/jp075567h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Intramolecular photoinduced charge separation and recombination within the donor-acceptor molecule 4-(N-pyrrolidino)naphthalene-1,8-imide-pyromellitimide, 5ANI-PI, are studied using ultrafast transient absorption spectroscopy in the room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide [EMIN][Tf2N]. The rate constants of both photoinduced charge separation and charge recombination for 5ANI-PI in [EMIM][Tf2N] are comparable to those observed in pyridine, which has a static dielectric constant similar to that of [EMIM][Tf2N] but a viscosity that is nearly 2 orders of magnitude lower than that of [EMIIM][Tf2N]. The electron-transfer dynamics of 5ANI-PI in [ENIIM][Tf2N] are compared to those in pyridine as a function of temperature and are discussed in the context of recently reported ionic liquid solvation studies.

引用

页码：11638 / 11641

页数：4

共 40 条

[1] Observing the complete solvation response of DCS in imidazolium. ionic liquids, from the femtosecond to nanosecond regimes [J].

Arzhantsev, S ;

Jin, H ;

Ito, N ;

Maroncelli, M .

CHEMICAL PHYSICS LETTERS, 2006, 417 (4-6) :524-529

[2] Measurements of the complete solvation response in ionic liquids [J].

Arzhantsev, Sergei ;

Jin, Hui ;

Baker, Gary A. ;

Maroncelli, Mark .

JOURNAL OF PHYSICAL CHEMISTRY B, 2007, 111 (18) :4978-4989

[3] Hydrophobic, highly conductive ambient-temperature molten salts [J].

Bonhote, P ;

Dias, AP ;

Papageorgiou, N ;

Kalyanasundaram, K ;

Gratzel, M .

INORGANIC CHEMISTRY, 1996, 35 (05) :1168-1178

[4] Ionic liquids: solvent properties and organic reactivity [J].

Chiappe, C ;

Pieraccini, D .

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2005, 18 (04) :275-297

[5] Dynamic solvation in room-temperature ionic liquids [J].

Chowdhury, PK ;

Halder, M ;

Sanders, L ;

Calhoun, T ;

Anderson, JL ;

Armstrong, DW ;

Song, X ;

Petrich, JW .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (29) :10245-10255

[6] Dielectric response of imidazolium-based room-temperature ionic liquids [J].

Daguenet, Corinne ;

Dyson, Paul J. ;

Krossing, Ingo ;

Oleinikova, Alla ;

Slattery, John ;

Wakai, Chihiro ;

Weingaertner, Hermann .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (25) :12682-12688

[7]

Debreczeny MP, 1996, NEW J CHEM, V20, P815

[8] Multistep photochemical charge separation in rod-like molecules based on aromatic imides and diimides [J].

Greenfield, SR ;

Svec, WA ;

Gosztola, D ;

Wasielewski, MR .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (28) :6767-6777

[9] Experimental and theoretical investigations of solvation dynamics of ionic fluids: Appropriateness of dielectric theory and the role of DC conductivity [J].

Halder, M. ;

Headley, L. Sanders ;

Mukherjee, P. ;

Song, X. ;

Petrich, J. W. .

JOURNAL OF PHYSICAL CHEMISTRY A, 2006, 110 (28) :8623-8626

[10] Dynamic solvation in imidazolium-based ionic liquids on short time scales [J].

Headley, Lindsay Sanders ;

Mukherjee, Prasun ;

Anderson, Jared L. ;

Ding, Rongfang ;

Halder, Mintu ;

Armstrong, Daniel W. ;

Song, Xueyu ;

Petrich, Jacob W. .

JOURNAL OF PHYSICAL CHEMISTRY A, 2006, 110 (31) :9549-9554

← 1 2 3 4 →