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A new series of dendrimers with 4,4′-bipyridinium cores capable of fast electron transfer reactions
被引:47
作者
:
Toba, R
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Toba, R
Quintela, JM
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Quintela, JM
Peinador, C
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Peinador, C
[
1
]
Román, E
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Román, E
Kaifer, AE
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Kaifer, AE
机构
:
[1]
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
[2]
Univ A Coruna, Dept Quim Fundamental, La Coruna 15071, Spain
[3]
Univ Miami, Dept Chem, Coral Gables, FL 33124 USA
来源
:
CHEMICAL COMMUNICATIONS
|
2001年
/ 09期
关键词
:
D O I
:
10.1039/b102134f
中图分类号
:
O6 [化学];
学科分类号
:
0703 ;
摘要
:
A new series of dendrimers containing a single 4,4'-bipyridinium (viologen) core has been synthesised and characterized that exhibit fast heterogeneous electron transfer reactions from the first to the third generation of dendritic growth.
引用
收藏
页码:857 / 858
页数:2
相关论文
共 18 条
[1]
Self-assembly of [n]rotaxanes bearing dendritic stoppers
Amabilino, DB
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Amabilino, DB
Ashton, PR
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Ashton, PR
Balzani, V
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Balzani, V
Brown, CL
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Brown, CL
论文数:
引用数:
h-index:
机构:
Credi, A
Frechet, JMJ
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Frechet, JMJ
Leon, JW
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Leon, JW
Raymo, FM
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Raymo, FM
Spencer, N
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Spencer, N
Stoddart, JF
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Stoddart, JF
论文数:
引用数:
h-index:
机构:
Venturi, M
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1996,
118
(48)
: 12012
-
12020
[2]
Designing dendrimers based on transition metal complexes. Light-harvesting properties and predetermined redox patterns
Balzani, V
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Balzani, V
Campagna, S
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Campagna, S
Denti, G
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Denti, G
Juris, A
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Juris, A
Serroni, S
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Serroni, S
论文数:
引用数:
h-index:
机构:
Venturi, M
[J].
ACCOUNTS OF CHEMICAL RESEARCH,
1998,
31
(01)
: 26
-
34
[3]
ELECTROCHEMISTRY OF THE VIOLOGENS
BIRD, CL
论文数:
0
引用数:
0
h-index:
0
机构:
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
BIRD, CL
KUHN, AT
论文数:
0
引用数:
0
h-index:
0
机构:
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
KUHN, AT
[J].
CHEMICAL SOCIETY REVIEWS,
1981,
10
(01)
: 49
-
82
[4]
Synthesis, electrochemistry, and interactions with β-cydodextrin of dendrimers containing a single ferrocene subunit located "off-center"
Cardona, CM
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Cardona, CM
McCarley, TD
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
McCarley, TD
Kaifer, AE
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Kaifer, AE
[J].
JOURNAL OF ORGANIC CHEMISTRY,
2000,
65
(06)
: 1857
-
1864
[5]
Dendrimers with porphyrin cores: Synthetic models for globular heme proteins
Dandliker, PJ
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Dandliker, PJ
Diederich, F
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Diederich, F
Zingg, A
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Zingg, A
Gisselbrecht, JP
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Gisselbrecht, JP
Gross, M
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Gross, M
Louati, A
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Louati, A
Sanford, E
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Sanford, E
[J].
HELVETICA CHIMICA ACTA,
1997,
80
(06)
: 1773
-
1801
[6]
Molecular structure-property relationships for electron-transfer rate attenuation in redox-active core dendrimers
Gorman, CB
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Gorman, CB
Smith, JC
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Smith, JC
Hager, MW
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Hager, MW
Parkhurst, BL
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Parkhurst, BL
Sierzputowska-Gracz, H
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Sierzputowska-Gracz, H
Haney, CA
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Haney, CA
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1999,
121
(43)
: 9958
-
9966
[7]
Encapsulated electroactive molecules based upon an inorganic cluster surrounded by dendron ligands
Gorman, CB
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Gorman, CB
Parkhurst, BL
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Parkhurst, BL
Su, WY
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Su, WY
Chen, KY
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Chen, KY
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1997,
119
(05)
: 1141
-
1142
[8]
PREPARATION OF POLYMERS WITH CONTROLLED MOLECULAR ARCHITECTURE - A NEW CONVERGENT APPROACH TO DENDRITIC MACROMOLECULES
HAWKER, CJ
论文数:
0
引用数:
0
h-index:
0
机构:
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
HAWKER, CJ
FRECHET, JMJ
论文数:
0
引用数:
0
h-index:
0
机构:
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
FRECHET, JMJ
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1990,
112
(21)
: 7638
-
7647
[9]
Heinen S, 2000, ANGEW CHEM INT EDIT, V39, P806, DOI 10.1002/(SICI)1521-3773(20000218)39:4<806::AID-ANIE806>3.0.CO
[10]
2-I
←
1
2
→
共 18 条
[1]
Self-assembly of [n]rotaxanes bearing dendritic stoppers
Amabilino, DB
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Amabilino, DB
Ashton, PR
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Ashton, PR
Balzani, V
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Balzani, V
Brown, CL
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Brown, CL
论文数:
引用数:
h-index:
机构:
Credi, A
Frechet, JMJ
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Frechet, JMJ
Leon, JW
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Leon, JW
Raymo, FM
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Raymo, FM
Spencer, N
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Spencer, N
Stoddart, JF
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
Stoddart, JF
论文数:
引用数:
h-index:
机构:
Venturi, M
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1996,
118
(48)
: 12012
-
12020
[2]
Designing dendrimers based on transition metal complexes. Light-harvesting properties and predetermined redox patterns
Balzani, V
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Balzani, V
Campagna, S
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Campagna, S
Denti, G
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Denti, G
Juris, A
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Juris, A
Serroni, S
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
Serroni, S
论文数:
引用数:
h-index:
机构:
Venturi, M
[J].
ACCOUNTS OF CHEMICAL RESEARCH,
1998,
31
(01)
: 26
-
34
[3]
ELECTROCHEMISTRY OF THE VIOLOGENS
BIRD, CL
论文数:
0
引用数:
0
h-index:
0
机构:
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
BIRD, CL
KUHN, AT
论文数:
0
引用数:
0
h-index:
0
机构:
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
INST DENT SURG,DEPT BIO MAT SCI,LONDON WC1X 8LD,ENGLAND
KUHN, AT
[J].
CHEMICAL SOCIETY REVIEWS,
1981,
10
(01)
: 49
-
82
[4]
Synthesis, electrochemistry, and interactions with β-cydodextrin of dendrimers containing a single ferrocene subunit located "off-center"
Cardona, CM
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Cardona, CM
McCarley, TD
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
McCarley, TD
Kaifer, AE
论文数:
0
引用数:
0
h-index:
0
机构:
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA
Kaifer, AE
[J].
JOURNAL OF ORGANIC CHEMISTRY,
2000,
65
(06)
: 1857
-
1864
[5]
Dendrimers with porphyrin cores: Synthetic models for globular heme proteins
Dandliker, PJ
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Dandliker, PJ
Diederich, F
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Diederich, F
Zingg, A
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Zingg, A
Gisselbrecht, JP
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Gisselbrecht, JP
Gross, M
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Gross, M
Louati, A
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Louati, A
Sanford, E
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV STRASBOURG 1,FAC CHIM,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,CNRS,URA 405,F-67008 STRASBOURG,FRANCE
Sanford, E
[J].
HELVETICA CHIMICA ACTA,
1997,
80
(06)
: 1773
-
1801
[6]
Molecular structure-property relationships for electron-transfer rate attenuation in redox-active core dendrimers
Gorman, CB
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Gorman, CB
Smith, JC
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Smith, JC
Hager, MW
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Hager, MW
Parkhurst, BL
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Parkhurst, BL
Sierzputowska-Gracz, H
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Sierzputowska-Gracz, H
Haney, CA
论文数:
0
引用数:
0
h-index:
0
机构:
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
Haney, CA
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1999,
121
(43)
: 9958
-
9966
[7]
Encapsulated electroactive molecules based upon an inorganic cluster surrounded by dendron ligands
Gorman, CB
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Gorman, CB
Parkhurst, BL
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Parkhurst, BL
Su, WY
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Su, WY
Chen, KY
论文数:
0
引用数:
0
h-index:
0
机构:
Department of Chemistry, North Carolina State University, Box 8204, Raleigh
Chen, KY
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1997,
119
(05)
: 1141
-
1142
[8]
PREPARATION OF POLYMERS WITH CONTROLLED MOLECULAR ARCHITECTURE - A NEW CONVERGENT APPROACH TO DENDRITIC MACROMOLECULES
HAWKER, CJ
论文数:
0
引用数:
0
h-index:
0
机构:
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
HAWKER, CJ
FRECHET, JMJ
论文数:
0
引用数:
0
h-index:
0
机构:
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
CORNELL UNIV,BAKER LAB,DEPT CHEM,ITHACA,NY 14853
FRECHET, JMJ
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1990,
112
(21)
: 7638
-
7647
[9]
Heinen S, 2000, ANGEW CHEM INT EDIT, V39, P806, DOI 10.1002/(SICI)1521-3773(20000218)39:4<806::AID-ANIE806>3.0.CO
[10]
2-I
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