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Ramu S, Baskar B. A simple and efficient metal free, additive, or base free dehydrogenation of tetrahydroisoquinolines using oxygen as a clean oxidant. CAN J CHEM 2021. [DOI: 10.1139/cjc-2020-0295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Metal free dehydrogenation of various substituted tetrahydroisoquinolines via a simple and convenient metal free, atom economical route for the synthesis of corresponding isoquinolines under oxygen atmosphere in N-methyl-2-pyrollidone (NMP) is described. Metal free dehydrogenation was carried out without the use of additive or base. A scope of the methodology was demonstrated for a number of aryl and heteroaryl substitutions present at C1 position and ester moiety at C3 position and was found to be good substrates. Substituted isoquinolines (3a–3h) and their esters (3i–3m) were synthesized in very good to excellent yields.
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Affiliation(s)
- Shanmugam Ramu
- Laboratory of Sustainable Chemistry, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chengalpet (Dt), Tamilnadu 603 203, India
- Laboratory of Sustainable Chemistry, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chengalpet (Dt), Tamilnadu 603 203, India
| | - Baburaj Baskar
- Laboratory of Sustainable Chemistry, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chengalpet (Dt), Tamilnadu 603 203, India
- Laboratory of Sustainable Chemistry, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chengalpet (Dt), Tamilnadu 603 203, India
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2
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Pyridyl substitution control dynamics and shape dependence of fluorescent aggregates. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Cheng Z, Dong H, Liang J, Zhang F, Chen X, Du L, Tan K. Highly selective fluorescent visual detection of perfluorooctane sulfonate via blue fluorescent carbon dots and berberine chloride hydrate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 207:262-269. [PMID: 30253323 DOI: 10.1016/j.saa.2018.09.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/14/2018] [Accepted: 09/15/2018] [Indexed: 05/21/2023]
Abstract
As a kind of emerging persistent organic pollutants, perfluorooctane sulfonate (PFOS) and its salts have caused global ecosystem pollution. To develop rapid, sensitive and low-cost detection method of PFOS is of great importance. In this work, a novel sensing method has been proposed for the highly selective fluorescent visual detection of PFOS in aqueous solution based on carbon dots (CDs) and berberine chloride hydrate (BH). It was found that the fluorescence of CDs decreased apparently in the presence of berberine chloride hydrate in pH 6.09 Britton-Robinson (BR) buffer solution. When PFOS was added to the system, the fluorescence was restored slightly at 448 nm and enhanced apparently at 533 nm, but no phenomenon occurred with other perfluorinated compounds. As a consequence, an obviously distinguishable fluorescence color variation (from blue to light yellow) of solution was observed. Under the optimized experimental conditions, the enhanced fluorescence intensities at 533 nm are in proportion to the concentration of PFOS in the range of 0.22-50.0 μmol/L (R2 = 0.9919), with a detection limit of 21.7 nmol/L (3σ). The proposed approach has been successfully applied to the detection of PFOS in environmental water samples with RSD ≤ 1.1%.
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Affiliation(s)
- Zhen Cheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Hongcen Dong
- Class 12 Senior Grade 2018, High School Affiliated to Southwest University, Chongqing 400700, PR China
| | - Jiaman Liang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Fang Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Xianping Chen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Lingling Du
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Kejun Tan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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4
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Zheng B, Trieu TH, Li FL, Zhu XL, He YG, Fan QQ, Shi XX. Copper-Catalyzed Benign and Efficient Oxidation of Tetrahydroisoquinolines and Dihydroisoquinolines Using Air as a Clean Oxidant. ACS OMEGA 2018; 3:8243-8252. [PMID: 31458961 PMCID: PMC6644811 DOI: 10.1021/acsomega.8b00855] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 06/06/2018] [Indexed: 06/10/2023]
Abstract
A green chemical method for mild oxidation of 1,2,3,4-tetrahydroisoquinolines (THIQs) and 3,4-dihydroisoquinolines (DHIQs) has been developed using air (O2) as a clean oxidant. DHIQs and THIQs could be efficiently oxidized to isoquinolines in dimethyl sulfoxide at 25 °C under an open air atmosphere with CuBr2 (20 mol %) as the catalyst; different bases [NaOEt and/or 1,8-diazabicyclo[5,4,0]undec-7-ene] were used for the reaction according to the patterns of substituents (R1, R2).
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Affiliation(s)
- Bo Zheng
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Tien Ha Trieu
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Feng-Lei Li
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Xing-Liang Zhu
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Yun-Gang He
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Qi-Qi Fan
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Xiao-Xin Shi
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
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5
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Tang X, Zhang J, Liu L, Yang D, Wang H, He F. Synthesis of 13-substituted derivatives of berberine: Aggregation-induced emission enhancement and pH sensitive property. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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6
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Soulié M, Carayon C, Saffon N, Blanc S, Fery-Forgues S. A comparative study of nine berberine salts in the solid state: optimization of the photoluminescence and self-association properties through the choice of the anion. Phys Chem Chem Phys 2016; 18:29999-30008. [DOI: 10.1039/c6cp05848e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Counter-ions regulate the photoluminescence and self-association properties of berberine salts.
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Affiliation(s)
| | - Chantal Carayon
- SPCMIB
- UMR5068
- CNRS-Université Paul Sabatier-Toulouse III
- F31062 Toulouse cedex 9
- France
| | - Nathalie Saffon
- Service commun RX
- Institut de Chimie de Toulouse
- ICT-FR2599
- Université de Toulouse
- F31062 Toulouse
| | - Sylvie Blanc
- Université de Pau et des Pays de l'Adour
- IPREM-UMR CNRS 5254
- F64053 Pau cedex 9
- France
| | - Suzanne Fery-Forgues
- SPCMIB
- UMR5068
- CNRS-Université Paul Sabatier-Toulouse III
- F31062 Toulouse cedex 9
- France
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7
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Bu F, Duan R, Xie Y, Yi Y, Peng Q, Hu R, Qin A, Zhao Z, Tang BZ. Unusual Aggregation-Induced Emission of a Coumarin Derivative as a Result of the Restriction of an Intramolecular Twisting Motion. Angew Chem Int Ed Engl 2015; 54:14492-7. [PMID: 26439884 DOI: 10.1002/anie.201506782] [Citation(s) in RCA: 170] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 08/31/2015] [Indexed: 12/22/2022]
Abstract
Aggregation-induced emission (AIE) is commonly observed for propeller-like luminogens with aromatic rotors and stators. Herein, we report that a coumarin derivative containing a seven-membered aliphatic ring (CD-7) but no rotors showed typical AIE characteristics, whereas its analogue with a five-membered aliphatic ring (CD-5) exhibited an opposite aggregation-caused quenching (ACQ) effect. Experimental and theoretical results revealed that a large aliphatic ring in CD-7 weakens structural rigidity and promotes out-of-plane twisting of the molecular backbone to drastically accelerate nonradiative excited-state decay, thus resulting in poor emission in solution. The restriction of twisting motion in aggregates blocks the nonradiative decay channels and enables CD-7 to fluoresce strongly. The results also show that AIE is a general phenomenon and not peculiar to propeller-like molecules. The AIE and ACQ effects can be switched readily by the modulation of molecular rigidity.
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Affiliation(s)
- Fan Bu
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (China)
| | - Ruihong Duan
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
| | - Yujun Xie
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
| | - Yuanping Yi
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
| | - Qian Peng
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China).
| | - Rongrong Hu
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (China)
| | - Anjun Qin
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (China)
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (China).
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (China). .,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong (China).
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8
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Bu F, Duan R, Xie Y, Yi Y, Peng Q, Hu R, Qin A, Zhao Z, Tang BZ. Unusual Aggregation-Induced Emission of a Coumarin Derivative as a Result of the Restriction of an Intramolecular Twisting Motion. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506782] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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9
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Soulié M, Frongia C, Lobjois V, Fery-Forgues S. Fluorescent organic ion pairs based on berberine: counter-ion effect on the formation of particles and on the uptake by colon cancer cells. RSC Adv 2015. [DOI: 10.1039/c4ra09993a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Counter-ions modulate the fluorescence of berberine ion pairs in cells, this process being possibly linked to the formation of nanoparticles.
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Affiliation(s)
- Marine Soulié
- CNRS, ITAV-USR 3505
- Institut des Technologies Avancées en sciences du Vivant (ITAV)
- F31106 Toulouse
- France
- Université de Toulouse
| | - Céline Frongia
- CNRS, ITAV-USR 3505
- Institut des Technologies Avancées en sciences du Vivant (ITAV)
- F31106 Toulouse
- France
- Université de Toulouse
| | - Valérie Lobjois
- CNRS, ITAV-USR 3505
- Institut des Technologies Avancées en sciences du Vivant (ITAV)
- F31106 Toulouse
- France
- Université de Toulouse
| | - Suzanne Fery-Forgues
- CNRS, ITAV-USR 3505
- Institut des Technologies Avancées en sciences du Vivant (ITAV)
- F31106 Toulouse
- France
- Université de Toulouse
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10
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Hu T, Yao B, Chen X, Li W, Song Z, Qin A, Sun JZ, Tang BZ. Effect of ionic interaction on the mechanochromic properties of pyridinium modified tetraphenylethene. Chem Commun (Camb) 2015; 51:8849-52. [DOI: 10.1039/c5cc02138c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Introducing ionic interaction into a soft tetraphenylethene-based AIE-molecule furnished the compound with robust mechanochromic effects while exhibiting aggregation-induced emission enhancement properties.
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Affiliation(s)
- Ting Hu
- MoE Key Laboratory of Macromolecular Synthesis & Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Bicheng Yao
- MoE Key Laboratory of Macromolecular Synthesis & Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Xiujuan Chen
- MoE Key Laboratory of Macromolecular Synthesis & Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Weizhang Li
- Guangdong Innovative Research Team
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Zhegang Song
- Department of Chemistry
- Institute for Advanced Study
- Institute of Molecular Functional Materials
- and State Key Laboratory of Molecular Neuroscience
- The Hong Kong University of Science & Technology
| | - Anjun Qin
- Guangdong Innovative Research Team
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Jing Zhi Sun
- MoE Key Laboratory of Macromolecular Synthesis & Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ben Zhong Tang
- MoE Key Laboratory of Macromolecular Synthesis & Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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11
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Mei J, Hong Y, Lam JWY, Qin A, Tang Y, Tang BZ. Aggregation-induced emission: the whole is more brilliant than the parts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5429-79. [PMID: 24975272 DOI: 10.1002/adma.201401356] [Citation(s) in RCA: 1820] [Impact Index Per Article: 182.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 05/25/2014] [Indexed: 05/20/2023]
Abstract
"United we stand, divided we fall."--Aesop. Aggregation-induced emission (AIE) refers to a photophysical phenomenon shown by a group of luminogenic materials that are non-emissive when they are dissolved in good solvents as molecules but become highly luminescent when they are clustered in poor solvents or solid state as aggregates. In this Review we summarize the recent progresses made in the area of AIE research. We conduct mechanistic analyses of the AIE processes, unify the restriction of intramolecular motions (RIM) as the main cause for the AIE effects, and derive RIM-based molecular engineering strategies for the design of new AIE luminogens (AIEgens). Typical examples of the newly developed AIEgens and their high-tech applications as optoelectronic materials, chemical sensors and biomedical probes are presented and discussed.
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Affiliation(s)
- Ju Mei
- Department of Chemistry, HKUST Jockey Club Institute for Advanced Study, Division of Life Science, Institute of Molecular Functional Materials and Division of Biomedical Engineering, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China
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12
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Pingali S, Donahue JP, Payton-Stewart F. Weak C-H···X (X = O, N) hydrogen bonds in the crystal structure of dihydroberberine. Acta Crystallogr C Struct Chem 2014; 70:388-91. [PMID: 24705054 PMCID: PMC4165590 DOI: 10.1107/s2053229614003751] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 02/18/2014] [Indexed: 12/19/2022] Open
Abstract
Dihydroberberine (systematic name: 9,10-dimethoxy-6,8-dihydro-5H-1,3-dioxolo[4,5-g]isoquinolino[3,2-a]isoquinoline), C20H19NO4, a reduced form of pharmacologically important berberine, crystallizes from ethanol without interstitial solvent. The molecule shows a dihedral angle of 27.94 (5)° between the two arene rings at the ends of the molecule, owing to the partial saturation of the inner quinolizine ring system. Although lacking classical O-H or N-H donors, the packing in the crystalline state is clearly governed by C-H···N and C-H···O hydrogen bonds involving the two acetal-type C-H bonds of the 1,3-dioxole ring. Each dihydroberberine molecule is engaged in four hydrogen bonds with neighbouring molecules, twice as donor and twice as acceptor, thus forming a two-dimensional sheet network that lies parallel to the (100) plane.
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Affiliation(s)
- Subramanya Pingali
- Department of Chemistry, Xavier University of Louisiana, 1 Drexel Drive, Box 114, New Orleans, LA 70125, USA
| | - James P. Donahue
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, LA 70118-5698, USA
| | - Florastina Payton-Stewart
- Department of Chemistry, Xavier University of Louisiana, 1 Drexel Drive, Box 114, New Orleans, LA 70125, USA
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Niu C, Zhao L, Fang T, Deng X, Ma H, Zhang J, Na N, Han J, Ouyang J. Color- and morphology-controlled self-assembly of new electron-donor-substituted aggregation-induced emission compounds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:2351-2359. [PMID: 24571508 DOI: 10.1021/la404436v] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Four electron-donor-substituted aggregation-induced emission (AIE) compounds, N,N'-bis(4-methoxylsalicylidene)-p-phenylenediamine (BSPD-OMe), N,N'-bis(4-methylsalicylidene)-p-phenylenediamine (BSPD-Me), N,N'-bis(salicylidene)-p-phenylenediamine (BSPD), and N,N'-bis(4-hydroxylsalicylidene)-p-phenylenediamine (BSPD-OH), are designed and synthesized. They are all found to exhibit controlled self-assembly behaviors and good thermal properties. By changing the terminal electron-donor groups, they are controlled to self-assemble into three emission colors (green, yellow, and orange) and four morphologies (microblocks, microparticles, microrods, and nanowires) in THF/water mixtures. Their self-assembled structures were investigated with scanning electron microscopy (SEM), fluorescent microscopy images, transmission electron microscopy (TEM), and powder X-ray diffraction (PXRD) techniques. In addition, the emission colors of BSPD-OH can be successfully controlled to three colors (green → yellow → orange) through simply changing the water fraction (fw). Their thermal gravimetric analysis (TGA) results indicate that their thermal decomposition temperatures (Td, corresponding to 5% weight loss) range from 282 to 319 °C. Their differential scanning calorimetry (DSC) data show that BSPD-OH bears a glass-transition temperature (Tg) of 118 °C. The good Td and Tg values will ensure them to be luminogens for organic light-emitting diodes (OLEDs). The theoretical calculations and single-crystal X-ray diffraction (XRD) analysis of BSPD-OMe and BSPD suggest that the stronger electron donor substituent can twist the molecular conformation, decrease the degree of π conjugation, increase the energy gap, and then induce the emission colors' blue shift and morphology variation. The results are meaningful in controlling the emission colors and self-assembly shapes of these derivatives, and they also provide a novel but facile way to get color-tunable AIE luminogens for OLEDs.
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Affiliation(s)
- Caixia Niu
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry and ‡Analytical and Testing Center, Beijing Normal University , Beijing 100875, China
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14
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Kamino S, Muranaka A, Murakami M, Tatsumi A, Nagaoka N, Shirasaki Y, Watanabe K, Yoshida K, Horigome J, Komeda S, Uchiyama M, Enomoto S. A red-emissive aminobenzopyrano-xanthene dye: elucidation of fluorescence emission mechanisms in solution and in the aggregate state. Phys Chem Chem Phys 2013; 15:2131-40. [DOI: 10.1039/c2cp43503a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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15
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Ghodbane A, Colléaux J, Saffon N, Mahiou R, Galaup JP, Fery-Forgues S. Blue-Emitting Nanocrystals, Microcrystals, and Highly Oriented Nanofibers Prepared by Reprecipitation and Solvent Drop-Casting of 2-Phenyl-naphthoxazoles. Chempluschem 2012. [DOI: 10.1002/cplu.201200233] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Straightforward preparation of organic colloidal particles by harnessing spontaneous non-covalent interactions of active molecules from natural origin. J Colloid Interface Sci 2012; 374:150-6. [DOI: 10.1016/j.jcis.2012.01.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 01/23/2012] [Accepted: 01/24/2012] [Indexed: 11/19/2022]
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17
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Patra A, Chandaluri CG, Radhakrishnan TP. Optical materials based on molecular nanoparticles. NANOSCALE 2012; 4:343-359. [PMID: 22159069 DOI: 10.1039/c1nr11313e] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A major part of contemporary nanomaterials research is focused on metal and semiconductor nanoparticles, constituted of extended lattices of atoms or ions. Molecular nanoparticles assembled from small molecules through non-covalent interactions are relatively less explored but equally fascinating materials. Their unique and versatile characteristics have attracted considerable attention in recent years, establishing their identity and status as a novel class of nanomaterials. Optical characteristics of molecular nanoparticles capture the essence of their nanoscale features and form the basis of a variety of applications. This review describes the advances made in the field of fabrication of molecular nanoparticles, the wide spectrum of their optical and nonlinear optical characteristics and explorations of the potential applications that exploit their unique optical attributes.
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Affiliation(s)
- A Patra
- School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India.
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18
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Ghodbane A, D'Altério S, Saffon N, McClenaghan ND, Scarpantonio L, Jolinat P, Fery-Forgues S. Facile access to highly fluorescent nanofibers and microcrystals via reprecipitation of 2-phenyl-benzoxazole derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:855-863. [PMID: 22128833 DOI: 10.1021/la2036554] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
2-Phenyl-benzoxazole and five derivatives bearing an alkyl or alkoxy substituent on the phenyl ring were used to prepare aqueous suspensions of particles via a solvent-exchange method. In these conditions, the methyl and methoxy derivatives spontaneously gave nanofibers, while the other compounds led to microcrystals. This shows that minor chemical changes are enough to direct the formation of a given type of particle. From a spectroscopic viewpoint, all compounds strongly emit blue light in the solid state, with spectra much broader than those registered in n-heptane and ethanol solutions. The photoluminescence quantum yields reached 38% and were slightly affected in aqueous suspension by the polarity of the environment. The molecular arrangement, deduced from X-ray analysis for the methyl and methoxy derivatives, was used to explain the fluorescence properties in the solid state. This work shows that 2-phenyl-benzoxazole derivatives are interesting candidates for applications as fluorescent nanomaterials, including in aqueous and biological media.
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Affiliation(s)
- Abdelhamid Ghodbane
- Laboratoire des Interactions Moléculaires Réactivité Chimique et Photochimique, CNRS UMR 5623, Université Paul Sabatier 31062 Toulouse cedex 9, France
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19
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Yuan WZ, Mahtab F, Gong Y, Yu ZQ, Lu P, Tang Y, Lam JWY, Zhu C, Tang BZ. Synthesis and self-assembly of tetraphenylethene and biphenyl based AIE-active triazoles. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30620d] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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