1
|
Park JH, Hipwell VM, Rivera EA, Garcia-Garibay MA. Strongly Entangled Triplet Acyl-Alkyl Radical Pairs in Crystals of Photostable Diphenylmethyl Adamantyl Ketones. J Am Chem Soc 2021; 143:8886-8892. [PMID: 34081867 DOI: 10.1021/jacs.1c03026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Radical pairs generated in crystalline solids by bond cleavage reactions of triplet ketones offer the unique opportunity to explore a frontier of spin dynamics where rigid radicals are highly entangled as the result of short inter-radical distances, large singlet-triplet energy gaps (ΔEST), and limited spin-lattice relaxation mechanisms. Here we report the pulsed laser generation and detection of strongly entangled triplet acyl-alkyl radical pairs generated in nanocrystalline suspensions of 1,1-diphenylmethyl 2-ketones with various 3-admantyl substituents. The sought-after triplet acyl-alkyl radical pairs could be studied for the first time in the solid state by taking advantage of the efficient triplet excited state α-cleavage reactions of 1,1-diphenylmethyl ketones and the slow rate of CO loss from the acyl radicals, which would have to generate highly unstable phenyl and primary alkyl radicals or relatively unstable secondary and tertiary alkyl radicals. With the loss of CO prevented, the lifetime of the triplet acyl-alkyl radical pair intermediates is determined by intersystem crossing to the singlet radical pair state, which is followed by immediate bond formation to the ground state starting ketone. Experimental results revealed biexponential kinetics with long-lived components that account for ca. 87-92% of the transient population and lifetimes that extend to the range of 53-63 μs, the longest reported so far for this type of radical pair. Structural information inferred from the starting ketone will make it possible to analyze the affects of proximity and orientation of the singly occupied orbitals and potentially help set a path for the use of triplet radical pairs as qubits in quantum information technologies.
Collapse
Affiliation(s)
- Jin H Park
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90024-1569, United States
| | - Vince M Hipwell
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90024-1569, United States
| | - Edris A Rivera
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90024-1569, United States
| | - Miguel A Garcia-Garibay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90024-1569, United States
| |
Collapse
|
2
|
Tatchen J, Kleinschmidt M, Marian CM. Calculating electron paramagnetic resonance g-matrices for triplet state molecules from multireference spin-orbit configuration interaction wave functions. J Chem Phys 2009; 130:154106. [DOI: 10.1063/1.3115965] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
|
3
|
Hochstrasser RM, Scott GW, Zewail AH. Optically detected E.P.R. and low-field ENDOR of triplet benzophenone. Mol Phys 2006. [DOI: 10.1080/00268977800101711] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
4
|
Yamauchi S, Pratt DW. Optical properties of 3(nπ*) benzophenones in 4, 4′-dibromodiphenylether host crystals. Mol Phys 2006. [DOI: 10.1080/00268977900100441] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Seigo Yamauchi
- a Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania , 15260 , U.S.A
| | - David W. Pratt
- a Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania , 15260 , U.S.A
| |
Collapse
|
5
|
Polymerization initiation and transient spectrometric studies of water-soluble and -insoluble tert-butyl aroylperbenzoates. J Photochem Photobiol A Chem 2005. [DOI: 10.1016/j.jphotochem.2004.07.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
6
|
Wakasa M, Nishizawa K, Abe H, Kido G, Hayashi H. Magnetic Field Effects Due to the Δg Mechanism upon Chemical Reactions through Radical Pairs under Ultrahigh Fields of up to 30 T. J Am Chem Soc 1999. [DOI: 10.1021/ja9912776] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masanobu Wakasa
- Contribution from the The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, and National Research Institute for Metals, Tukuba, Ibaraki 305, Japan
| | - Kiyoshi Nishizawa
- Contribution from the The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, and National Research Institute for Metals, Tukuba, Ibaraki 305, Japan
| | - Haruo Abe
- Contribution from the The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, and National Research Institute for Metals, Tukuba, Ibaraki 305, Japan
| | - Giyuu Kido
- Contribution from the The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, and National Research Institute for Metals, Tukuba, Ibaraki 305, Japan
| | - Hisaharu Hayashi
- Contribution from the The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, and National Research Institute for Metals, Tukuba, Ibaraki 305, Japan
| |
Collapse
|
7
|
Wagner PJ, Sedon JH, Gudmundsdottir A. Photoinduced Radical Cleavage of Bromophenyl Ketones. J Am Chem Soc 1996. [DOI: 10.1021/ja952782f] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter J. Wagner
- Contribution from the Chemistry Department, Michigan State University, East Lansing, Michigan 48824
| | - James. H. Sedon
- Contribution from the Chemistry Department, Michigan State University, East Lansing, Michigan 48824
| | - Anna Gudmundsdottir
- Contribution from the Chemistry Department, Michigan State University, East Lansing, Michigan 48824
| |
Collapse
|
8
|
Koyanagi M, Goh M. Angular dependence of the phosphorescence polarization spectra of benzophenone at low temperature. J Chem Phys 1992. [DOI: 10.1063/1.462042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
9
|
Zero-Field Spin Dynamics and Relaxation. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/b978-0-12-025517-7.50006-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
10
|
Fritsch R, Brunner H, Hausser K. Triplet electron-proton cross-polarization by satisfying a modified Hartmann-Hahn condition. Chem Phys 1991. [DOI: 10.1016/0301-0104(91)80107-s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
11
|
Prisner T, Dinse K. Determination of the deuteron quadrupole coupling tensor in the photo-excited triplet state of dibromobenzophenone by electron spin echo envelope modulation. Chem Phys 1990. [DOI: 10.1016/0301-0104(90)80036-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
12
|
Chan IY, Qian XQ. Pressure dependence of zero‐field splittings in organic triplets. II. Carbonyls. J Chem Phys 1990. [DOI: 10.1063/1.458075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Bachert P, Brunner H, Hausser K, Colpa J. Microwave-induced optical nuclear polarization (MI ONP) of benzophenone in dibromodiphenylether. Chem Phys 1984. [DOI: 10.1016/0301-0104(84)80076-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
14
|
Hilburn S, Power R, Martin K, Nishimura A. Spin relaxation in the phosphorescent triplet state of several pyridyl carbonyl compounds. Chem Phys Lett 1983. [DOI: 10.1016/0009-2614(83)87343-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
15
|
Sandroff C, Chan I. Triplet emission from furil in different crystalline environments: Optical and odmr studies. Chem Phys Lett 1983. [DOI: 10.1016/0009-2614(83)87184-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
16
|
Stark effect as a probe of the lowest triplet-state orbital configuration in benzophenone and three derivatives. Chem Phys Lett 1982. [DOI: 10.1016/0009-2614(82)83048-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
17
|
Optically detected electron—nuclear double resonance and electron—nuclear—nuclear triple resonance study of 17O hyperfine coupling in the lowest nπ* triplet state of benzil. Chem Phys Lett 1982. [DOI: 10.1016/0009-2614(82)80054-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Griesser HJ, Bramley R. Xanthone. I. optical detection of an extremely large sublevel splitting the lowest triplet state. Chem Phys 1982. [DOI: 10.1016/0301-0104(82)85197-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
19
|
Griesser HJ, Bramley R. Triplet xanthone in n-pentane: multiple emission from a single site. Chem Phys Lett 1982. [DOI: 10.1016/0009-2614(82)80063-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
20
|
Wäckerle G, Bär M, Zimmermann H, Dinse K, Yamauchi S, Kashmar RJ, Pratt DW. Optically detected magnetic resonance studies of photoexcited17O‐benzophenone. Orbital rotation in the lowest triplet state. J Chem Phys 1982. [DOI: 10.1063/1.443300] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
21
|
Burland DM. The spectroscopy of xanthione in xanthone: An example of spin–orbit coupling dominated zero‐field splitting. J Chem Phys 1981. [DOI: 10.1063/1.442418] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Van Der Velden G, De Boer E, Veeman W. Optical and magnetic properties of disubstituted benzophenones with lowest 3nπ* states. Chem Phys 1981. [DOI: 10.1016/0301-0104(81)80004-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
23
|
|
24
|
Després A, Migirdicyan E. Guest and host deuterium effects of the large ZFS parameters D of dimethylbenzaldehydes in durene single crystals. Chem Phys 1980. [DOI: 10.1016/0301-0104(80)85108-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
25
|
|
26
|
Single crystal ODMR and phosphorescence studies of the 3nπ* state of aliphatic carbonyl: 2-indanone. Chem Phys Lett 1979. [DOI: 10.1016/0009-2614(79)80522-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
27
|
Isotope effects on the fine structure parameters and phosphorescence spectra of triplet benzophenones. Chem Phys Lett 1979. [DOI: 10.1016/0009-2614(79)80776-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
28
|
|
29
|
Magnetic Properties of Triplet States. ACTA ACUST UNITED AC 1979. [DOI: 10.1016/b978-0-12-227204-2.50007-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
|
30
|
|
31
|
Von Borczyskowski C, Plato M, Dinse KP, Möbius K. ODMR and Proton-ENDOR investigations of the symmetry and geometry of the lowest excited triplet state of quinoxaline and p-dichlorobenzene at high magnetic fields. Chem Phys 1978. [DOI: 10.1016/s0301-0104(78)85251-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
|
33
|
Yamauchi S, Pratt DW. Lifetime measurements in the vicinity of magnetically-induced avoided crossings in molecular crystals. Chem Phys Lett 1978. [DOI: 10.1016/0009-2614(78)85536-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
34
|
Hossain M, Hanson DM. Relative magnitudes of singlet and triplet state dipole moments: the lowest nπ* excited states of p-methylbenzaldehyde and p-chlorobenzaldehyde. Chem Phys 1978. [DOI: 10.1016/0301-0104(78)85115-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
35
|
Brode P, Pratt D. Frequency-dependent endor spectroscopy. Absolute signs of the hyperfine elements of triplet states. Chem Phys Lett 1978. [DOI: 10.1016/0009-2614(78)85295-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
36
|
Kothandaraman G, Brode P, Pratt D. Optically-detected radiofrequency studies of level anticrossings in phosphorescent crystals. Chem Phys Lett 1977. [DOI: 10.1016/0009-2614(77)85371-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
37
|
Mucha JA, Pratt DW. Level‐anticrossing and cross‐relaxation effects in oriented molecular triplet states. 3(n,π*) benzophenones in 4,4′‐dibromodiphenylether. J Chem Phys 1977. [DOI: 10.1063/1.433897] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|