1
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Kim KR, Kim J, Oh J, Kim J, Hong JI. Electrochemiluminescence of dimethylaminonaphthalene-oxazaborine donor-acceptor luminophores. Chem Commun (Camb) 2023; 59:13058-13061. [PMID: 37847254 DOI: 10.1039/d3cc03892k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Donor-acceptor (D-A) type molecules with a skeleton consisting of a dimethylaminonaphthalene donor and an oxazaborine acceptor were designed as efficient electrochemiluminescence (ECL) luminophores with tunable intramolecular charge transfer (ICT). The D-A ECL luminophores demonstrated that the ICT characteristics play a critical role in the electrochemistry and ECL of luminophores in the presence of tri-n-propylamine, which was rationalised experimentally and computationally. Furthemore, dual-peaked ECL-potential behaviours of the luminophores were rationalised using two competitive pathway ECL mechanisms, elucidated through the use of spooling ECL spectroscopy.
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Affiliation(s)
- Kyoung-Rok Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Jiwoo Kim
- Department of Chemistry, KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Jinrok Oh
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Joohoon Kim
- Department of Chemistry, KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Jong-In Hong
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
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2
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Dicyanopyrazino Phenanthrene based Charge transfer derivatives: Role of amine donor in Tuning of Photophysical, Aggregation-induced emission, Electrochemical and Theoretical properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Kapse DM, Singh PS, Ghadiyali M, Chacko S, Kamble RM. Blue-red emitting materials based on a pyrido[2,3- b]pyrazine backbone: design and tuning of the photophysical, aggregation-induced emission, electrochemical and theoretical properties. RSC Adv 2022; 12:6888-6905. [PMID: 35424617 PMCID: PMC8981966 DOI: 10.1039/d2ra00128d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 02/12/2022] [Indexed: 11/21/2022] Open
Abstract
Pyrido[2,3-b]pyrazine-based donor-acceptor-donor (D-A-D) molecules were designed by altering donor amines and synthesized using the Buchwald-Hartwig C-N coupling reaction. Further, the tunable opto-electrochemical properties of the dyes were studied in detail. The dye possesses intramolecular charge transfer (ICT) transition (412-485 nm), which marked the D-A architecture and induces a broad range of emissions from blue to red (486-624 nm) in the solution and solid state. Some of the dyes show aggregation-induced emission (AIE) features and formation of nanoparticles in the THF/H2O mixture, as confirmed by DLS and FEG-SEM (of 7) analysis. The AIE characteristics indicate its solid/aggregate-state application in organic electronics. The molecules exhibit high thermal stability, low band gap (1.67-2.36 eV) and comparable HOMO (-5.34 to -5.97 eV) and LUMO (-3.61 to -3.70 eV) energy levels with those of reported ambipolar materials. The relationship between the geometrical structure and optoelectronic properties of the dyes, as well as their twisted molecular conformation and small singlet and triplet excitation energy difference (ΔE ST = 0.01-0.23 eV) were analyzed using the DFT/TDDFT method. Thus, potential applications of the dyes are proposed for optoelectronic devices.
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Affiliation(s)
- Deepak M Kapse
- Department of Chemistry, University of Mumbai Santacruz (E) Mumbai 400 098 India
| | - Pooja S Singh
- Department of Chemistry, University of Mumbai Santacruz (E) Mumbai 400 098 India
| | - Mohammed Ghadiyali
- Department of Physics, University of Mumbai Santacruz (E) Mumbai 400 098 India
| | - Sajeev Chacko
- Department of Physics, University of Mumbai Santacruz (E) Mumbai 400 098 India
| | - Rajesh M Kamble
- Department of Chemistry, University of Mumbai Santacruz (E) Mumbai 400 098 India
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4
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Singh PS, Badani PM, Kamble RM. Blue-orange emitting carbazole based donor-acceptor derivatives: Synthesis and studies of modulating acceptor unit on opto-electrochemical and theoretical properties. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113457] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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5
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Optimizing the Electrochemiluminescence of Readily Accessible Pyrido[1,2‐α]pyrimidines through “Green” Substituent Regulation. ChemElectroChem 2021. [DOI: 10.1002/celc.202001531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Tu TT, Lei YM, Chai YQ, Zhuo Y, Yuan R. Organic Dots Embedded in Mesostructured Silica Xerogel as High-Performance ECL Emitters: Preparation and Application for MicroRNA-126 Detection. ACS APPLIED MATERIALS & INTERFACES 2020; 12:3945-3952. [PMID: 31877251 DOI: 10.1021/acsami.9b17751] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Unlike the organic micro/nanocrystals prepared using an emerging reprecipitation method, a novel method of embedding 1-pyrenecarboxaldehyde dots (PycDs) into a mesostructured silica xerogel (PycDs@MSX) for use as electrochemiluminescence (ECL) emitters was first proposed to achieve an extremely strong ECL response, with peroxydisulfate (S2O82-) used as a coreactant. In this method, (i) PycDs@MSX could ensure the reversal of the PycDs environment from hydrophobic to hydrophilic and (ii) PycDs@MSX could provide massive porous channels, allowing for access of hydrophilic reactive intermediates (i.e., sulfate anion radicals, SO4•-), which could accelerate the rate of mass transfer and electron transfer between S2O82- and PycDs. Using Ag nanoparticles as a coreaction accelerator and a 3D DNA nanomachine as a signal amplification strategy, the proposed ECL biosensing platform was constructed and achieved ultrasensitive detection of microRNA-126 with an excellent linear range (from 100 aM to 100 pM) and a low detection limit (13.0 aM). More importantly, this work not only developed an innovative avenue to improve the ECL efficiency of organic emitters in aqueous phases but also provided a powerful strategy for biochemical analysis and disease diagnosis applications.
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Affiliation(s)
- Ting-Ting Tu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , PR China
| | - Yan-Mei Lei
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , PR China
| | - Ya-Qin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , PR China
| | - Ying Zhuo
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , PR China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , PR China
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7
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Singh PS, Badani PM, Kamble RM. Impact of the donor substituent on the optoelectrochemical properties of 6H-indolo[2,3-b]quinoxaline amine derivatives. NEW J CHEM 2019. [DOI: 10.1039/c9nj05558d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An opto-electrochemical study of D–A based indolo-quinoxaline amine derivatives was performed by varying the strength of the amine substituent.
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Affiliation(s)
- Pooja S. Singh
- Department of Chemistry
- University of Mumbai
- Santacruz (E)
- Mumbai 400 098
- India
| | - Purav M. Badani
- Department of Chemistry
- University of Mumbai
- Santacruz (E)
- Mumbai 400 098
- India
| | - Rajesh M. Kamble
- Department of Chemistry
- University of Mumbai
- Santacruz (E)
- Mumbai 400 098
- India
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8
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Temperature-dependence of spectral and photophysical properties of polycyclic aromatic hydrocarbon derivatives of acetylene and buta-1,3-diyne. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Kapturkiewicz A. Electrochemical Generation of Excited Intramolecular Charge-Transfer States. ChemElectroChem 2017. [DOI: 10.1002/celc.201600865] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Andrzej Kapturkiewicz
- Institute of Chemistry, Faculty of Sciences; Siedlce University of Natural Sciences and Humanities; 3 Maja 54 08-110 Siedlce Poland
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10
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Szyszkowska M, Bylińska I, Wiczk W. Influence of an electron-acceptor substituent type on the photophysical properties of unsymmetrically substituted diphenylacetylene. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.03.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Collier GS, Brown LA, Boone ES, Long BK, Kilbey SM. Synthesis of Main Chain Purine-Based Copolymers and Effects of Monomer Design on Thermal and Optical Properties. ACS Macro Lett 2016; 5:682-687. [PMID: 35614655 DOI: 10.1021/acsmacrolett.6b00275] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ability to incorporate diverse monomeric building blocks enables the development of advanced polymeric materials possessing a wide range of properties that suits them for myriad applications. Herein, that synthetic toolbox is expanded through the first report of purine-based copolymers in which purines are incorporated directly into the polymer main chain. Stille cross-coupling of dibromopurine monomers with benzodithiophene (BDT) comonomers is used to generate these "poly(purine)s", and variations in the substitution pattern of the purine monomer and BDT side-chains provides insight into the role of monomer design on their resultant thermal and photophysical properties. Specifically, thermal analyses show that poly(purine)s exhibit high thermal stability and high glass transition temperatures depending on the BDT side-chain substituents and substitution pattern of the purine-derived comonomer. Furthermore, optical properties measured via UV-vis and fluorescence spectroscopies show dependence on monomer substitution pattern. These findings demonstrate the viability of synthesizing poly(purine)s via metal-catalyzed cross-coupling reactions and highlight the potential to tailor poly(purine) properties via simple alterations of comonomers.
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Affiliation(s)
- Graham S. Collier
- Departments of †Chemistry and ‡Chemical and Biomolecular
Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Lauren A. Brown
- Departments of †Chemistry and ‡Chemical and Biomolecular
Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Evan S. Boone
- Departments of †Chemistry and ‡Chemical and Biomolecular
Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Brian K. Long
- Departments of †Chemistry and ‡Chemical and Biomolecular
Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - S. Michael Kilbey
- Departments of †Chemistry and ‡Chemical and Biomolecular
Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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12
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Teimuri-Mofrad R, Rahimpour K, Ghadari R. Synthesis, characterization, and electronic properties of novel Fc-DCM conjugated system; experimental and computational studies. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.03.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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13
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Bylińska I, Wierzbicka M, Czaplewski C, Wiczk W. Photophysical properties of symmetrically substituted diarylacetylenes and diarylbuta-1,3-diynes. Photochem Photobiol Sci 2016; 15:45-56. [DOI: 10.1039/c5pp00197h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of symmetrically substituted diarylacetylenes and diaryl-1,3-butadiynes were prepared and studied with an emphasis on their spectral and photophysical properties.
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Affiliation(s)
- Irena Bylińska
- Faculty of Chemistry
- University of Gdańsk
- Wita Stwosza 63
- Poland
| | | | | | - Wiesław Wiczk
- Faculty of Chemistry
- University of Gdańsk
- Wita Stwosza 63
- Poland
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14
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Wierzbicka M, Bylińska I, Czaplewski C, Wiczk W. Experimental and theoretical studies of the spectroscopic properties of simple symmetrically substituted diphenylacetylene derivatives. RSC Adv 2015. [DOI: 10.1039/c5ra01077b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
A series of symmetrically substituted diphenylacetylene derivatives possessing electron-donating or electron-accepting character were prepared and studied with respect to their spectral and photophysical properties.
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15
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Bylińska I, Wierzbicka M, Czaplewski C, Wiczk W. Solvatochromic studies of pull–push molecules containing dimethylaniline and aromatic hydrocarbon linked by an acetylene unit. RSC Adv 2014. [DOI: 10.1039/c4ra06999d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Pull–push molecules containing dimethylaniline and aromatic hydrocarbon linked by an acetylene unit were studied using spectroscopic methods and DFT theoretical calculations.
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Affiliation(s)
- Irena Bylińska
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk, Poland
| | | | | | - Wiesław Wiczk
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk, Poland
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16
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Natarajan P, Schmittel M. Photoluminescence, Redox Properties, and Electrogenerated Chemiluminescence of Twisted 9,9′-Bianthryls. J Org Chem 2013; 78:10383-94. [DOI: 10.1021/jo401785c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Palani Natarajan
- Center of Micro- and Nanochemistry
and Engineering, Department of Chemistry and Biology, Organische Chemie
I, Universität Siegen, Adolf-Reichwein-Straße 2, D-57068 Siegen, Germany
| | - Michael Schmittel
- Center of Micro- and Nanochemistry
and Engineering, Department of Chemistry and Biology, Organische Chemie
I, Universität Siegen, Adolf-Reichwein-Straße 2, D-57068 Siegen, Germany
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17
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Samori S, Tojo S, Fujitsuka M, Lin JH, Ho TI, Yang JS, Majima T. Emission from Charge Recombination between Radical Cations and Radical Anions of 9-Cyano-10-(p-Substituted Phenyl)Anthracene Generated during Pulse Radiolysis. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200600164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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18
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Sun CL, Li J, Geng HW, Li H, Ai Y, Wang Q, Pan SL, Zhang HL. Understanding the Unconventional Effects of Halogenation on the Luminescent Properties of Oligo(Phenylene Vinylene) Molecules. Chem Asian J 2013; 8:3091-100. [DOI: 10.1002/asia.201300732] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Indexed: 11/06/2022]
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19
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Klymenko OV, Svir I, Amatore C. A New Approach for the Simulation of Electrochemiluminescence (ECL). Chemphyschem 2013; 14:2237-50. [DOI: 10.1002/cphc.201300126] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Indexed: 11/06/2022]
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20
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Bouzayen N, Zaidi B, Mabrouk A, Chemek M, Alimi K. Density functional theory studies of new bipolar carbazole–benzothiazole: Electronic and vibrational properties. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2011.12.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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21
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Thomas KRJ, Tyagi P. Synthesis, Spectra, and Theoretical Investigations of the Triarylamines Based on 6H-Indolo[2,3-b]quinoxaline. J Org Chem 2010; 75:8100-11. [DOI: 10.1021/jo1016663] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. R. Justin Thomas
- Organic Materials Lab, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
| | - Payal Tyagi
- Organic Materials Lab, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
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22
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Kim SH, Kim SH, Kim KH, Kim JN. Synthesis of 10-Arylanthracenes from 2-Fluorobenzophenones and Arylacetonitriles via a One-Pot SN. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Samori S, Tojo S, Fujitsuka M, Majima T. Important factors for the radiolysis-induced emission intensity of aromatic hydrocarbons. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.05.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Wei Y, Samori S, Tojo S, Fujitsuka M, Lin JS, Chen CT, Majima T. Emission Mechanism of Doubly ortho-Linked Quinoxaline/Diphenylfluorene or cis-Stilbene/Fluorene Hybrid Compounds Based on the Transient Absorption and Emission Measurements during Pulse Radiolysis. J Am Chem Soc 2009; 131:6698-707. [DOI: 10.1021/ja8090005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yi Wei
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Shingo Samori
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Sachiko Tojo
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Mamoru Fujitsuka
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Jin-Sheng Lin
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Chien-Tien Chen
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Tetsuro Majima
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 11650, and the Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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25
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Samori S, Tojo S, Fujitsuka M, Ryhding T, Fix AG, Armstrong BM, Haley MM, Majima T. Emission from Regioisomeric Bis(phenylethynyl)benzenes during Pulse Radiolysis. J Org Chem 2009; 74:3776-82. [DOI: 10.1021/jo900494j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shingo Samori
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Sachiko Tojo
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Torben Ryhding
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Aaron G. Fix
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Brittany M. Armstrong
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Michael M. Haley
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253
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26
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Oh JW, Lee Y, Kim T, Ko K, Lee J, Kim H, Kim J. Enhancement of Electrogenerated Chemiluminescence and Radical Stability by Peripheral Multidonors on Alkynylpyrene Derivatives. Angew Chem Int Ed Engl 2009; 48:2522-4. [DOI: 10.1002/anie.200804669] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Oh JW, Lee Y, Kim T, Ko K, Lee J, Kim H, Kim J. Enhancement of Electrogenerated Chemiluminescence and Radical Stability by Peripheral Multidonors on Alkynylpyrene Derivatives. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200804669] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Jiang X, Yang X, Zhao C, Sun L. Electrogenerated chemiluminescence of benzo 15-crown-5 derivatives. J PHYS ORG CHEM 2009. [DOI: 10.1002/poc.1414] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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29
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Sonar P, Singh SP, Leclère P, Surin M, Lazzaroni R, Lin TT, Dodabalapur A, Sellinger A. Synthesis, characterization and comparative study of thiophene–benzothiadiazole based donor–acceptor–donor (D–A–D) materials. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b820528k] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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30
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Affiliation(s)
- Wujian Miao
- Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, USA.
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31
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Goldsmith RH, Vura-Weis J, Scott AM, Borkar S, Sen A, Ratner MA, Wasielewski MR. Unexpectedly Similar Charge Transfer Rates through Benzo-Annulated Bicyclo[2.2.2]octanes. J Am Chem Soc 2008; 130:7659-69. [DOI: 10.1021/ja8004623] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Randall H. Goldsmith
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Josh Vura-Weis
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Amy M. Scott
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Sachin Borkar
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Ayusman Sen
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Mark A. Ratner
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Michael R. Wasielewski
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 and the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
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32
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Samori S, Tojo S, Fujitsuka M, Spitler EL, Haley MM, Majima T. Fine-Tuning of Radiolysis Induced Emission by Variable Substitution of Donor-/Acceptor-Substituted Tetrakis(arylethynyl)benzenes. J Org Chem 2008; 73:3551-8. [DOI: 10.1021/jo8001535] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shingo Samori
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Sachiko Tojo
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Eric L. Spitler
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Michael M. Haley
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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33
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Bylińska I, Sikorski A, Wiczk W. 4-(9-Anthryl)-2-methylbutyn-2-ol. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o484-5. [PMID: 21201508 PMCID: PMC2960210 DOI: 10.1107/s1600536808001542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Accepted: 01/15/2008] [Indexed: 11/22/2022]
Abstract
There are two molecules in the asymmetric unit of the title compound, C19H16O. Neighbouring molecules are linked through O—H⋯O hydrogen bonds into an R44(8) ring motif. There are also C—H⋯π hydrogen and π–π interactions. The molecules are either parallel to each other or are inclined at an angle of 12.5 (1)°.
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Affiliation(s)
- Irena Bylińska
- Faculty of Chemistry, University of Gdańsk, J. Sobieskiego 18, 80-952 Gdańsk, Poland
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34
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Sung K, Huang PM, Zhou CH. Hydroquinone-benzonitrile system: intramolecular charge-transfer and computational studies. J Fluoresc 2007; 17:492-9. [PMID: 17629718 DOI: 10.1007/s10895-007-0199-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2007] [Accepted: 05/03/2007] [Indexed: 10/23/2022]
Abstract
A novel intramolecular donor-acceptor system of hydroquinone-benzonitrile was synthesized. Its photo-induced intramolecular charge-transfer (ICT) transition was confirmed by (1) shift of its emission maximum with increasing solvent polarity, (2) high dipole moment for the ICT excited state calculated from the Lippert equation, and (3) its HOMO and LUMO. According to the extent of separation between HOMO and LUMO, it is suggested that substituent position (ortho, meta, or para) in the donor-acceptor biphenyls is not a key point for the photo-induced intramolecular charge transfer and the donor with two alkoxy or hydroxy groups has more photo-induced charge transfer transitions than the one with one alkoxy or hydroxy group. In other words, the hydroquinone-benzonitrile system displays more photo-induced charge transfer transitions than 4COB (4-cyano-4'-butyloxybiphenyl).
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Affiliation(s)
- Kuangsen Sung
- Department of Chemistry, National Cheng Kung University, Tainan, Taiwan.
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35
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Samori S, Tojo S, Fujitsuka M, Spitler EL, Haley MM, Majima T. Donor−Acceptor-Substituted Tetrakis(phenylethynyl)benzenes as Emissive Molecules during Pulse Radiolysis in Benzene. J Org Chem 2007; 72:2785-93. [PMID: 17367190 DOI: 10.1021/jo062326h] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Emission from charge recombination between radical cations and anions of various tetrakis(phenylethynyl)benzenes (TPEBs) was measured during pulse radiolysis in benzene (Bz). The formation of TPEB in the singlet excited state (1TPEB*) can be attributed to the charge recombination between TPEB*+ and TPEB*-, which are initially generated from the radiolytic reaction in Bz. This mechanism is reasonably explained by the relationship between the annihilation enthalpy change (-DeltaH degrees) for the charge recombination of TPEB*+ and TPEB*- and excitation energy of 1TPEB*. It was found that the charge recombination between TPEB*+ and TPEB*- occurred to give 1TPEB* as the emissive species, but not the excimers because of the large repulsion between substituents caused by the rotation around C-C single bonds of TPEBs. Since donor-acceptor-substituted TPEBs possess three types of charge-transfer pathways (linear-conjugated, cross-conjugated, and "bent" conjugated pathways between the donor and acceptor substituents through the ethynyl linkage), the emission spectra of 1TPEBs* with intramolecular charge transfer (ICT) character depend on the substitution pattern and the various kinds of donor and acceptor groups during pulse radiolysis in Bz.
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Affiliation(s)
- Shingo Samori
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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36
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Chinchilla R, Najera C. The Sonogashira Reaction: A Booming Methodology in Synthetic Organic Chemistry. Chem Rev 2007; 107:874-922. [PMID: 17305399 DOI: 10.1021/cr050992x] [Citation(s) in RCA: 2264] [Impact Index Per Article: 133.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafael Chinchilla
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Facultad de Ciencias, Apartado 99, 03080 Alicante, Spain.
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37
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Zhang WW, Yu YG, Lu ZD, Mao WL, Li YZ, Meng QJ. Ferrocene−Phenothiazine Conjugated Molecules: Synthesis, Structural Characterization, Electronic Properties, and DFT-TDDFT Computational Study. Organometallics 2007. [DOI: 10.1021/om060923o] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wen-Wei Zhang
- Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yong-Guang Yu
- Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
| | - Zhen-Da Lu
- Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
| | - Wei-Li Mao
- Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yi-Zhi Li
- Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
| | - Qing-Jin Meng
- Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
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38
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Ha-Thi MH, Souchon V, Hamdi A, Métivier R, Alain V, Nakatani K, Lacroix PG, Genêt JP, Michelet V, Leray I. Synthesis of Novel Rod-Shaped and Star-Shaped Fluorescent Phosphane Oxides—Nonlinear Optical Properties and Photophysical Properties. Chemistry 2006; 12:9056-65. [PMID: 16955525 DOI: 10.1002/chem.200600464] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The design of a new class of fluorophores is presented. Some push-pull chromophores (D-pi-A) containing polyphenylethynyl units and a phosphane oxide moiety were efficiently prepared from common intermediates. Straightforward syntheses gave novel one-armed, rod-shaped and three-armed, star-shaped fluorophores. The optical properties of the resulting star-shaped derivatives were evaluated, showed high fluorescence quantum yields, and their excitation induces very efficient charge redistribution. Moreover, thanks to their push-pull character, the molecules exhibited significant second-order NLO properties with good transparency, up to 67x10(-30) esu at 1907 nm, with an absorption lambdamax at 369 nm. The effect of the donor group and of the number of phenylethynyl arms have been studied in this work.
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Affiliation(s)
- Minh-Huong Ha-Thi
- CNRS UMR 8531 Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires, Département de Chimie, ENS-Cachan, 61 avenue du Président Wilson, 94235 Cachan Cedex, France
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39
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Sonoda Y, Goto M, Tsuzuki S, Tamaoki N. Fluorescence Spectroscopic Properties and Crystal Structure of a Series of Donor−Acceptor Diphenylpolyenes. J Phys Chem A 2006; 110:13379-87. [PMID: 17165862 DOI: 10.1021/jp064937j] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of p-nitro-p'-alkoxy(OR)-substituted (E,E,E)-1,6-diphenyl-1,3,5-hexatrienes (1a, R = Me; 1b, R = Et; 1c, R = n-Pr; 1d, R = n-Bu) were prepared. The absorption and fluorescence spectra in solution were almost independent of the alkoxy chain length. The absorption maximum showed only a small dependence on the solvent polarity, whereas the fluorescence maximum red-shifted largely as the polarity increased. The solid-state absorption and fluorescence spectra were red-shifted relative to those in low polar solvents and were clearly dependent on the alkoxy chain length. The fluorescence maxima for the crystals of 1b and 1d were observed at 635-650 nm, which were red-shifted by 40-50 nm relative to those for 1a and 1c. The Stokes shifts were all relatively small (3000-3500 cm-1). For all four compounds, the fluorescence decay curves in the solid state were able to be analyzed by single-exponential fitting to give the lifetimes of 1.1-1.3 ns. This indicates that the emission of 1a-d is not originated from an excimer or molecular aggregates, but from only one emitting monomeric species. The fluorescence quantum yields of 1a-d were considerably high compared with the values for organic solids, which is consistent with their monomeric origin of emission. Single-crystal X-ray structure analyses of 1a, 1c, and 1d showed that the crystal packing was dependent on the alkoxy chain length. The crystals of 1a and 1c had herringbone structure, whereas that of 1d had pi-stacked structure. Strong pi-pi interaction in the crystal of 1d would be the cause of the spectral red shifts relative to those for 1a and 1c. No observation of excimer fluorescence from crystal 1d can be attributed to the limited overlap between the pi-planes of the molecules due to its "slipped-parallel" structure.
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Affiliation(s)
- Yoriko Sonoda
- Nanotechnology Research Institute and Technical Center, National Institute of Advanced Industrial Science and Technology (AIST), Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan.
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40
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Samori S, Tojo S, Fujitsuka M, Liang HJ, Ho TI, Yang JS, Majima T. Emission from Charge Recombination during the Pulse Radiolysis of 9-Cyano-10-phenylethynylanthracenes with Donor and Acceptor Substituents. J Org Chem 2006; 71:8732-9. [PMID: 17081000 DOI: 10.1021/jo060929n] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Emission from 9-cyano-10-phenylanthracene and 9-cyano-10-phenylethynylanthracenes having donor and acceptor substituents (RA = PA, PEA, OEA, NEA, and DEA) was studied with the time-resolved fluorescence measurement during the pulse radiolysis of RAs in benzene (Bz). PA and DEA showed only monomer emission, while other RAs (PEA, OEA, and NEA) showed both monomer and excimer emissions with much lower intensities. On the basis of the steady-state and transient absorption and emission measurements, the formation of RA in the singlet excited state ((1)RA*) can be attributed to the charge recombination between RA radical cation and anion (RA*+ and RA*-, respectively) which are initially generated from the radiolytic reaction in Bz. It is expected that for PA with a twisted geometry, the charge recombination between PA*+ and PA*- occurs to give (1)PA* during the pulse radiolysis in Bz. For PEA and OEA, pi-stacking interaction is possible for the formation of an encounter complex during the charge recombination between RA*+ and RA*-. For NEA, it is expected that NEA*+ and NEA*- collide neck-to-neck to generate the excimer due to the twisted geometry. For DEA, a considerably twisted structure is assumed to give (1)DEA* with strong ICT character but not (1)(DEA)2* because of the bulky donor substituent.
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Affiliation(s)
- Shingo Samori
- Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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41
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Yang X, Jiang X, Zhao C, Chen R, Qin P, Sun L. Donor–acceptor molecules containing thiophene chromophore: synthesis, spectroscopic study and electrogenerated chemiluminescence. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.04.154] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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42
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Samori S, Tojo S, Fujitsuka M, Yang SW, Ho TI, Yang JS, Majima T. Emission from Charge Recombination during the Pulse Radiolysis of Arylethynylpyrenes. J Phys Chem B 2006; 110:13296-303. [PMID: 16805644 DOI: 10.1021/jp062022z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Emission from several 1-(arylethynyl)pyrenes with a substituent on the aryl group (REPy, R = phenyl (PEPy), 4-dimethylaminophenyl (NPEPy), 4-isopropoxyphenyl (OPEPy), 2-quinonyl (QEPy), and 9-(10-cyanoanthracenyl) (AEPy)) was studied with time-resolved fluorescence measurements during pulse radiolysis in benzene. NPEPy and AEPy showed only monomer emission, while PEPy, OPEPy, and QEPy showed both monomer and excimer emissions during pulse radiolysis. In addition, REPy's also showed long-lived emissions with very weak intensities in the absence of oxygen, which were assigned to the "P-type" delayed fluorescence derived from the triplet-triplet annihilation. The formation of REPy's in the singlet excited state (1REPy*) can be interpreted as the charge recombination between the REPy radical cation and anion (REPy*+ and REPy*-, respectively), which are initially generated from the radiolytic reaction in benzene. Both the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of PEPy are localized on the 1-pyrenyl (Py) moiety, while the HOMO of REPy's with an electron donating or withdrawing substituent on the benzene ring (R(D)EPy such as NPEPy and OPEPy or R(A)EPy such as QEPy and AEPy) is mainly localized on the donor moieties (R(D) or Py) and the LUMO on the acceptor ones (Py or R(A), respectively). Therefore, it is suggested that the one-electron oxidation and reduction of REPy's can occur from the donor and acceptor moieties, respectively. This scheme reasonably explains the relationship between the annihilation enthalpy changes (-Delta H' degrees) for the charge recombination of REPy*+ and REPy*- and the singlet excitation energies (E'(S1) of the REPy's. The results are compared with those in electrogenerated chemiluminescence.
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Affiliation(s)
- Shingo Samori
- Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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43
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Kulkarni AP, Wu PT, Kwon TW, Jenekhe SA. Phenothiazine-Phenylquinoline Donor−Acceptor Molecules: Effects of Structural Isomerism on Charge Transfer Photophysics and Electroluminescence. J Phys Chem B 2005; 109:19584-94. [PMID: 16853533 DOI: 10.1021/jp0529772] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Large differences in the intramolecular charge-transfer fluorescence quantum yields and electroluminescence efficiencies were observed among the isomeric donor-acceptor molecules 2-(4-phenyl-2-quinolyl)-10-methylphenothiazine (2PQMPT) and 3-(4-phenyl-2-quinolyl)-10-methylphenothiazine (3PQMPT). In solution, the 2PQMPT isomer had a larger positive solvatochromism and thus a greater degree of charge transfer, whereas 3PQMPT had a larger fluorescence quantum yield (71%) compared to 2PQMPT (46%). High brightness (23750 cd/m(2)) and high efficiency (8.18 cd/A, 4.45 lm/W, 2.42% external quantum efficiency at 1015 cd/m(2)) green electroluminescence was achieved from 3PQMPT diodes. In contrast, green light-emitting diodes with lower brightness (8900 cd/m(2)) and efficiencies (4.79 cd/A, 2.36 lm/W, 1.41% external quantum efficiency at 690 cd/m(2)) were obtained from 2PQMPT. The two isomeric donor-acceptor molecules had identical HOMO (5.1 eV) and LUMO (2.4 eV) energy levels derived from electrochemistry. Density functional theory (DFT) calculations provided insights into the molecular geometry, electronic structures, and properties of the donor-acceptor isomers. These results demonstrate the pronounced influence of the donor/acceptor connection on the charge-transfer emission efficiency of donor-acceptor molecules and the performance of solid-state light-emitting devices based on them.
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Affiliation(s)
- Abhishek P Kulkarni
- Department of Chemical Engineering and Department of Chemistry, University of Washington, Seattle, Washington 98195-1750, USA
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44
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Lin JH, Elangovan A, Ho TI. Structure−Property Relationships in Conjugated Donor−Acceptor Molecules Based on Cyanoanthracene: Computational and Experimental Studies. J Org Chem 2005; 70:7397-407. [PMID: 16122265 DOI: 10.1021/jo051183g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Two series of pi-conjugated bipolar compounds, namely, 9-phenyl-10-anthronitriles (PAN series) and 9-phenylethynyl-10-anthronitriles (PEAN series), having inherent redox centers have been synthesized and their electronic absorption, fluorescence emission, and electrochemical behavior have been studied. Electrochemiluminescence of these molecules bearing weak, strong, and spin-polarized donors is also studied. The observed electronic properties are explained with the help of results obtained from density functional theory (DFT- B3LYP/6-31G) calculations. The structure-property relationships of all the molecules are discussed.
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Affiliation(s)
- Jui-Hsien Lin
- Department of Chemistry, National Taiwan University, Taipei - 106, Taiwan
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45
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Samori S, Tojo S, Fujitsuka M, Yang SW, Elangovan A, Ho TI, Majima T. Efficient Emission from Charge Recombination during the Pulse Radiolysis of Electrochemical Luminescent Donor−Acceptor Molecules with an Ethynyl Linkage. J Org Chem 2005; 70:6661-8. [PMID: 16095284 DOI: 10.1021/jo0506377] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Efficient monomer and excimer emission from various donor-acceptor substituted phenylethynes (PE), which are known as efficient electrogenerated chemiluminescent molecules, was observed with time-resolved fluorescence measurement during the pulse radiolysis in benzene. On the basis of the transient absorption and emission measurements, and steady-state measurements, the formation of PE in the singlet excited state (1PE*) and the excimer (1PE2*) can be interpreted by the charge recombination between the PE radical cation (PE.+) and the PE radical anion (PE.-) which are generated initially from the radiolytic reaction in benzene. It is suggested that the positive and negative charges are localized on the donor and acceptor moieties in the radical cation and anion, respectively. This mechanism is reasonably explained by the relationship between the annihilation enthalpy changes (-DeltaH' degrees ) and singlet excitation energies of donor-substituted phenyl(9-acridinyl)ethynes (1(a-e)). In addition to the monomer emission, the compounds bearing weak donors (1(a-d)) show the excimer emission due to a very small twist angle between the donor and acceptor moieties. For the phenyl(9-cyano-10-anthracenyl)ethynes (2(c) and 2(f)), although they also show the monomer and excimer emissions, it cannot be explained by the relationship between -DeltaH' degrees values and their singlet excitation energies, suggesting the formation of the ICT state and H-type excimer in which two 9-cyano-10-anthracenyl moieties are stacked face-to-face with donor bearing a benzene ring projecting perpendicularly away from each other through the charge recombination between 2.+) and 2.-) and/or triplet-triplet annihilation.
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Affiliation(s)
- Shingo Samori
- Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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