1
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Crundwell G, Glagovich NM, Reed Heinrich EM, Ouellette P. N-(4-Chlorophenyl)-9 H-fluoren-9-imine. IUCRDATA 2019. [DOI: 10.1107/s2414314619005558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The title compound, C19H12ClN, was synthesizedviareaction of 9-fluorenone and 4-chloroaniline usingp-toluenesulfonic acid in toluene. The dihedral angle between the fluorene moiety (r.m.s. deviation = 0.027 Å) and the chlorophenyl ring is 64.59 (6)° and a possible weak intramolecular C—H...π interaction occurs.
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2
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Barik S, Skene WG. Turning-on the Quenched Fluorescence of Azomethines through Structural Modifications. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201502] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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Mallet C, Le Borgne M, Starck M, Skene WG. Unparalleled fluorescence of a polyazomethine prepared from the self-condensation of an automer and its potential use as a fluorimetric sensor for explosive detection. Polym Chem 2013. [DOI: 10.1039/c2py20703f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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4
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Survey of recent advances of in the field of π-conjugated heterocyclic azomethines as materials with tuneable properties. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4778-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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5
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Chartrand D, Castro Ruiz CA, Hanan GS. Diimine Triscarbonyl Re(I) of Isomeric Pyridyl-fulvene Ligands: an Electrochemical, Spectroscopic, and Computational Investigation. Inorg Chem 2012; 51:12738-47. [DOI: 10.1021/ic301559s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Chartrand
- Department of Chemistry, Université de Montréal, Montréal,
Québec H3T 1J4, Canada
| | | | - Garry S. Hanan
- Department of Chemistry, Université de Montréal, Montréal,
Québec H3T 1J4, Canada
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6
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Robert P, Bolduc A, Skene WG. Oligofluorenes as Polymeric Model Compounds for Providing Insight into the Triplets of Ketone and Ketylimine Derivatives. J Phys Chem A 2012; 116:9305-14. [DOI: 10.1021/jp307781n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patricia Robert
- Laboratoire de caractérisation photophysique des matériaux conjugués, Département de Chimie, Université de Montréal, CP 6128, Centre-ville, Montreal, QC
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7
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Dong Y, Navarathne D, Bolduc A, McGregor N, Skene WG. α,α′-N-Boc-Substituted Bi- and Terthiophenes: Fluorescent Precursors for Functional Materials. J Org Chem 2012; 77:5429-33. [DOI: 10.1021/jo300687d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yanmei Dong
- Laboratoire de Caractérisation Photophysique
des Matériaux Conjugués, Department of Chemistry, Pavillon
JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montreal, Quebec H3C 3J6, Canada
| | - Daminda Navarathne
- Laboratoire de Caractérisation Photophysique
des Matériaux Conjugués, Department of Chemistry, Pavillon
JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montreal, Quebec H3C 3J6, Canada
| | - Andréanne Bolduc
- Laboratoire de Caractérisation Photophysique
des Matériaux Conjugués, Department of Chemistry, Pavillon
JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montreal, Quebec H3C 3J6, Canada
| | - Nicholas McGregor
- Laboratoire de Caractérisation Photophysique
des Matériaux Conjugués, Department of Chemistry, Pavillon
JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montreal, Quebec H3C 3J6, Canada
| | - W. G. Skene
- Laboratoire de Caractérisation Photophysique
des Matériaux Conjugués, Department of Chemistry, Pavillon
JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montreal, Quebec H3C 3J6, Canada
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8
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Barik S, Bletzacker T, Skene WG. π-Conjugated Fluorescent Azomethine Copolymers: Opto-Electronic, Halochromic, and Doping Properties. Macromolecules 2012. [DOI: 10.1021/ma2024304] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Satyananda Barik
- Laboratoire
de caractérisation photophysique
des matériaux conjugués, Département de Chimie,
Pavillon JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montréal, Québec, H3C
3J7, Canada
| | - Thomas Bletzacker
- Laboratoire
de caractérisation photophysique
des matériaux conjugués, Département de Chimie,
Pavillon JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montréal, Québec, H3C
3J7, Canada
| | - W. G. Skene
- Laboratoire
de caractérisation photophysique
des matériaux conjugués, Département de Chimie,
Pavillon JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montréal, Québec, H3C
3J7, Canada
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9
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Tshibaka T, Bishop S, Roche IU, Dufresne S, Lubell WD, Skene WG. Conjugated 4-methoxybipyrrole thiophene azomethines: synthesis, opto-electronic properties, and crystallographic characterization. Chemistry 2011; 17:10879-88. [PMID: 21882273 DOI: 10.1002/chem.201101397] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Indexed: 11/11/2022]
Abstract
In the search of functional materials with improved electrochromic properties, thiophenes and asymmetric bipyrroles have been conjugated with azomethine units. 4-Methoxy-2,2'-bipyrroles 3-6 were first synthesized by a general route from 4-hydroxyproline and converted subsequently to dialdehydes 8-15, which underwent condensations with different aminothiophenes to provide azomethine conjugates 14-18 and 20-22. The crystallization and X-ray analysis of 20 showed the heterocycles and azomethine bonds were all co-planar with the heterocycles adopting an anti-parallel arrangement. These configurations result in extended conjugation and enhanced opto-electronic properties of the azomethines. Oxidation potential (E(pa)) was tailored by modification of the substitution pattern of the terminal thiophenes and central pyrroles of the azomethines. The combined low E(pa) and extended azomethine degree of conjugation resulted in stark color transitions occurring between their neutral and oxidized states. Reversible color formation was induced both electrochemically and by doping/de-doping with trifluoroacetic acid/triethylamine.
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Affiliation(s)
- Tshitundu Tshibaka
- Département de Chimie, Université de Montréal, CP 6128, succ. Centre-ville, Montréal, Québec, H3C 3J7, Canada
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10
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Knipping É, Roche IU, Dufresne S, McGregor N, Skene W. Selective fluorescence turn-on of a prefluorescent azomethine with Zn2+. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.06.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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McGregor N, Pardin C, Skene WG. Using Quenching Kinetics and Thermodynamics of Amino-Fluorophores as Empirical Tools for Predicting Boronic Acid Sensors Suitable for Use in Physiological Conditions. Aust J Chem 2011. [DOI: 10.1071/ch11297] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A series of water-soluble 1-amino-naphthalenes and 2-amino-fluorenes are prepared. These serve as model fluorophores for measuring the thermodynamics and kinetics of fluorescence quenching with phenylboronic acids and aliphatic amines. Steady-state and time-resolved fluorescence quenching kinetics are investigated using the Stern–Volmer method. Diffusion limited quenching constants and exergonic thermodynamics of electron transfer are derived for the 5-amino-1-napthol and 2-aminofluorene derivatives with phenylboronic acid and/or an aliphatic imine. No quenching and endergonic thermodynamics or electron transfer are observed for 5-sulfonamide, 5-sulfonic acid, or 5-hydroxy-7-sulfonic acid aminonaphthalene derivatives. Boronic acid sensors synthesized from these aminofluorophores by reductive amination with 2-formylphenylboronic acid undergo fluorescence revival in the presence of saccharides only when the fluorophore demonstrates diffusion limited quenching kinetics and exergonic thermodynamics of electron transfer with the boronic acid or imine quenchers. Thus, these two properties are suitable empirical tools for predicting saccharide-induced fluorescence revival of boronic acid sensors.
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