1
|
Wang B, Tan Q, Lu J, Liang H. Facile synthesis of hyperbranched poly(p-phenyleneethynylene-alt-m-phenyleneethynylene) with narrow dispersity and high branching degree by sonogashira polymerization of an AB2monomer. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Biyun Wang
- DSAPM Lab, PCFM Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
- Patent Examination Cooperation Center of the Patent Office, SIPO, Guangdong; Guangzhou 510535 China
| | - Qinglan Tan
- DSAPM Lab, PCFM Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Jiang Lu
- DSAPM Lab, PCFM Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Hui Liang
- DSAPM Lab, PCFM Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| |
Collapse
|
2
|
Klikar M, le Poul P, Růžička A, Pytela O, Barsella A, Dorkenoo KD, Robin-le Guen F, Bureš F, Achelle S. Dipolar NLO Chromophores Bearing Diazine Rings as π-Conjugated Linkers. J Org Chem 2017; 82:9435-9451. [PMID: 28836778 DOI: 10.1021/acs.joc.7b01442] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The synthesis of a series of push-pull derivatives bearing triphenylamine electron-donating group, cyclopenta[c]thiophen-4,6-dione electron acceptor and various π-linkers including (hetero)aromatic fragments is reported. All target chromophores with systematically varied π-linker structure were further investigated by electrochemistry, absorption measurements, and EFISH experiments in conjunction with DFT calculations. Based on electrochemical and photophysical measurements, when a polarizable 2,5-thienylene moiety is embedded into the chromophore π-backbone the highest intramolecular charge transfer (ICT) is observed. Benzene, pyrimidine, and pyridazine derivatives exhibit lower polarizability and extent of the ICT across these π-linkers. The elongation of the π-conjugated system via additional ethenylene linker results in a significant reduction of the HOMO-LUMO gap and an enhancement of the NLO response. Whereas it does not significantly influence electrochemical and linear optical properties, the orientation of the pyrimidine ring seems to be a key parameter on the μβ value due to significant variation of the dipolar moment (μ) value. In 2a and 2c, pyrimidine is oriented to behave as an acceptor and thus generate dipolar molecule with μ above 5 D, whereas in 2b and 2d ground state dipole moment is significantly reduced. This study seems to indicate a high aromaticity of pyrimidine and pyridazine derivatives, close to the benzene analogues and significantly higher than thiophene analogues.
Collapse
Affiliation(s)
- Milan Klikar
- Institut des Sciences Chimiques de Rennes UMR CNRS 6226, IUT de Lannion, Université de Rennes 1 , rue Edouard Branly, BP 30219, F22302 Lannion Cedex, France.,Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Studentská 573, Pardubice 53210, Czech Republic
| | - Pascal le Poul
- Institut des Sciences Chimiques de Rennes UMR CNRS 6226, IUT de Lannion, Université de Rennes 1 , rue Edouard Branly, BP 30219, F22302 Lannion Cedex, France
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice , Studentská 573, Pardubice 53210, Czech Republic
| | - Oldřich Pytela
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Studentská 573, Pardubice 53210, Czech Republic
| | - Alberto Barsella
- Département d'Optique ultra-rapide et Nanophotonique, IPCMS-CNRS , 23 Rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
| | - Kokou D Dorkenoo
- Département d'Optique ultra-rapide et Nanophotonique, IPCMS-CNRS , 23 Rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
| | - Françoise Robin-le Guen
- Institut des Sciences Chimiques de Rennes UMR CNRS 6226, IUT de Lannion, Université de Rennes 1 , rue Edouard Branly, BP 30219, F22302 Lannion Cedex, France
| | - Filip Bureš
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Studentská 573, Pardubice 53210, Czech Republic
| | - Sylvain Achelle
- Institut des Sciences Chimiques de Rennes UMR CNRS 6226, IUT de Lannion, Université de Rennes 1 , rue Edouard Branly, BP 30219, F22302 Lannion Cedex, France
| |
Collapse
|
3
|
Zheng W, Chen LJ, Yang G, Sun B, Wang X, Jiang B, Yin GQ, Zhang L, Li X, Liu M, Chen G, Yang HB. Construction of Smart Supramolecular Polymeric Hydrogels Cross-linked by Discrete Organoplatinum(II) Metallacycles via Post-Assembly Polymerization. J Am Chem Soc 2016; 138:4927-37. [DOI: 10.1021/jacs.6b01089] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wei Zheng
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, School of
Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
| | - Li-Jun Chen
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, School of
Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
| | - Guang Yang
- The
State Key Laboratory of Molecular Engineering of Polymers and Department
of Macromolecular Science, Fudan University, Shanghai 200433, People’s Republic of China
| | - Bin Sun
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, School of
Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
- Department of Chemistry and Biochemistry & Materials Science, Engineering, and Commercialization Program, Texas State University, San Macros, Texas 78666, United States
| | - Xu Wang
- Department of Chemistry and Biochemistry & Materials Science, Engineering, and Commercialization Program, Texas State University, San Macros, Texas 78666, United States
| | - Bo Jiang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, School of
Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
| | - Guang-Qiang Yin
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, School of
Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
| | - Li Zhang
- Key
Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute
of Chemistry, The Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Xiaopeng Li
- Department of Chemistry and Biochemistry & Materials Science, Engineering, and Commercialization Program, Texas State University, San Macros, Texas 78666, United States
| | - Minghua Liu
- Key
Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute
of Chemistry, The Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Guosong Chen
- The
State Key Laboratory of Molecular Engineering of Polymers and Department
of Macromolecular Science, Fudan University, Shanghai 200433, People’s Republic of China
| | - Hai-Bo Yang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, School of
Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, People’s Republic of China
| |
Collapse
|
4
|
Yao D, Zhang X, Mongin O, Paul F, Paul-Roth CO. Synthesis and Characterization of New Conjugated Fluorenyl-Porphyrin Dendrimers for Optics. Chemistry 2016; 22:5583-97. [DOI: 10.1002/chem.201504617] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 02/02/2016] [Indexed: 01/23/2023]
Affiliation(s)
- Dandan Yao
- Institut des Sciences Chimiques de Rennes (ISCR)-UMR CNRS 6226; Université de Rennes 1; 35042 Rennes Cedex France
- Institut National des Sciences Appliquées (INSA); Université Européenne de Bretagne; 35043 Rennes Cedex France
| | - Xu Zhang
- Institut des Sciences Chimiques de Rennes (ISCR)-UMR CNRS 6226; Université de Rennes 1; 35042 Rennes Cedex France
- Institut National des Sciences Appliquées (INSA); Université Européenne de Bretagne; 35043 Rennes Cedex France
| | - Olivier Mongin
- Institut des Sciences Chimiques de Rennes (ISCR)-UMR CNRS 6226; Université de Rennes 1; 35042 Rennes Cedex France
| | - Frédéric Paul
- Institut des Sciences Chimiques de Rennes (ISCR)-UMR CNRS 6226; Université de Rennes 1; 35042 Rennes Cedex France
| | - Christine O. Paul-Roth
- Institut des Sciences Chimiques de Rennes (ISCR)-UMR CNRS 6226; Université de Rennes 1; 35042 Rennes Cedex France
- Institut National des Sciences Appliquées (INSA); Université Européenne de Bretagne; 35043 Rennes Cedex France
| |
Collapse
|
5
|
High Fluorescent Porphyrin-PAMAM-Fluorene Dendrimers. Molecules 2015; 20:8548-59. [PMID: 25985356 PMCID: PMC6272304 DOI: 10.3390/molecules20058548] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 04/22/2015] [Accepted: 05/05/2015] [Indexed: 11/16/2022] Open
Abstract
Two new classes of dendrimers bearing 8 and 32 fluorene donor groups have been synthesized. The first and second generations of these porphyrin-PAMAM-fluorene dendrimers were characterized by 1H-NMR, 13C-NMR, FTIR, UV-vis spectroscopy, elemental analyses and MALDI-TOF mass spectrometry. The UV-vis spectra showed that the individual properties of donor and acceptor moieties were preserved, indicating that the new dendrimers could be used as photosynthetic antennae. Furthermore, for fluorescent spectroscopy, these dendrimers showed good energy transfer.
Collapse
|
6
|
Fang R, Xu H, Cao W, Yang L, Zhang X. Reactive oxygen species (ROS)-responsive tellurium-containing hyperbranched polymer. Polym Chem 2015. [DOI: 10.1039/c5py00050e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tellurium-containing hyperbranched polymers form aggregates, which are a new kind of material responsive to reactive oxygen species at a physiological level.
Collapse
Affiliation(s)
- Ruochen Fang
- The Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Huaping Xu
- The Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Wei Cao
- The Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Liulin Yang
- The Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Xi Zhang
- The Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| |
Collapse
|
7
|
Wu W, Tang R, Li Q, Li Z. Functional hyperbranched polymers with advanced optical, electrical and magnetic properties. Chem Soc Rev 2015; 44:3997-4022. [DOI: 10.1039/c4cs00224e] [Citation(s) in RCA: 292] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review summarizes the recent progress in functional HBPs and their application in optics, electronics and magnetics, including light-emitting devices, aggregation-induced emission materials, nonlinear optical materials, chemosensors, solar cells, magnetic materials, etc., and provides outlooks for further exploration in the field.
Collapse
Affiliation(s)
- Wenbo Wu
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Runli Tang
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Qianqian Li
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Zhen Li
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| |
Collapse
|
8
|
Roberts DA, Castilla AM, Ronson TK, Nitschke JR. Post-assembly Modification of Kinetically Metastable FeII2L3 Triple Helicates. J Am Chem Soc 2014; 136:8201-4. [DOI: 10.1021/ja5042397] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Derrick A. Roberts
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Ana M. Castilla
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Tanya K. Ronson
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Jonathan R. Nitschke
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| |
Collapse
|
9
|
Robb MJ, Montarnal D, Eisenmenger ND, Ku SY, Chabinyc ML, Hawker CJ. A One-Step Strategy for End-Functionalized Donor–Acceptor Conjugated Polymers. Macromolecules 2013. [DOI: 10.1021/ma401255d] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Maxwell J. Robb
- Department
of Chemistry and Biochemistry, ‡Materials Department, §Materials Research Laboratory, and ∥Mitsubishi Chemical
Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, California
93106, United States
| | - Damien Montarnal
- Department
of Chemistry and Biochemistry, ‡Materials Department, §Materials Research Laboratory, and ∥Mitsubishi Chemical
Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, California
93106, United States
| | - Nancy D. Eisenmenger
- Department
of Chemistry and Biochemistry, ‡Materials Department, §Materials Research Laboratory, and ∥Mitsubishi Chemical
Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, California
93106, United States
| | - Sung-Yu Ku
- Department
of Chemistry and Biochemistry, ‡Materials Department, §Materials Research Laboratory, and ∥Mitsubishi Chemical
Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, California
93106, United States
| | - Michael L. Chabinyc
- Department
of Chemistry and Biochemistry, ‡Materials Department, §Materials Research Laboratory, and ∥Mitsubishi Chemical
Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, California
93106, United States
| | - Craig J. Hawker
- Department
of Chemistry and Biochemistry, ‡Materials Department, §Materials Research Laboratory, and ∥Mitsubishi Chemical
Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, California
93106, United States
| |
Collapse
|
10
|
|
11
|
Zhao W, Song J, Shao Y, Zhang W, Au A, Fan LJ. Preparation of Fluorescent Conjugated Polymer Films with Different Emission Colors: Investigation into the Influences of Chemical Structure and Morphology. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200235] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
|
13
|
|
14
|
Drouet S, Paul-Roth CO. Fluorenyl dendrimer porphyrins: synthesis and photophysical properties. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.10.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
15
|
Zou L, Liu Z, Yan X, Liu Y, Fu Y, Liu J, Huang Z, Chen X, Qin J. Star-Shaped D-π-A Molecules Containing a 2,4,6-Tri(thiophen-2-yl)-1,3,5-triazine Unit: Synthesis and Two-Photon Absorption Properties. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900641] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
16
|
Liu F, Liu J, Liu R, Hou X, Xie L, Wu H, Tang C, Wei W, Cao Y, Huang W. Hyperbranched framework of interrupted π‐conjugated polymers end‐capped with high carrier‐mobility moieties for stable light‐emitting materials with low driving voltage. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23685] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Feng Liu
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Ju‐Qing Liu
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Ran‐Ran Liu
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Xiao‐Ya Hou
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Ling‐Hai Xie
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Hong‐Bin Wu
- Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Chao Tang
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Wei Wei
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| | - Yong Cao
- Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Wei Huang
- Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 2100046, China
| |
Collapse
|
17
|
Affiliation(s)
- Wouter Maes
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium, Fax: +32‐16‐327990
| | - Wim Dehaen
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium, Fax: +32‐16‐327990
| |
Collapse
|
18
|
Vuković J, Jovanović S, Lechner MD, Vodnik V. Melt rheology of aliphatic hyperbranched polyesters. J Appl Polym Sci 2009. [DOI: 10.1002/app.29836] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
19
|
Drouet S, Paul-Roth CO, Simonneaux G. Synthesis and photophysical properties of porphyrins with fluorenyl pendant arms. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.02.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Tanis I, Tragoudaras D, Karatasos K, Anastasiadis SH. Molecular Dynamics Simulations of a Hyperbranched Poly(ester amide): Statics, Dynamics, and Hydrogen Bonding. J Phys Chem B 2009; 113:5356-68. [DOI: 10.1021/jp8097999] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- I. Tanis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 711 10 Heraklion, Crete, Greece, and Department of Chemistry, University of Crete, 710 03 Heraklion, Crete, Greece
| | - D. Tragoudaras
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 711 10 Heraklion, Crete, Greece, and Department of Chemistry, University of Crete, 710 03 Heraklion, Crete, Greece
| | - K. Karatasos
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 711 10 Heraklion, Crete, Greece, and Department of Chemistry, University of Crete, 710 03 Heraklion, Crete, Greece
| | - S. H. Anastasiadis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 711 10 Heraklion, Crete, Greece, and Department of Chemistry, University of Crete, 710 03 Heraklion, Crete, Greece
| |
Collapse
|
21
|
Feng J, Li Y, Yang M. Hyperbranched copolymer containing triphenylamine and divinyl bipyridyl units for fluorescent chemosensors. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.23145] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
22
|
|
23
|
Fang K, Xu Z, Jiang X, Fu S. Preparation of amphiphilic hyperbranched polyesteramides by grafting mono methoxy polyethylene glycol onto hyperbranched polyesteramides via 2,4-tolylene diisocyanate. Polym Bull (Berl) 2008. [DOI: 10.1007/s00289-008-0930-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
24
|
Jiang HJ, Wang HY, Zhu R, Wan JH, Liu F, Feng JC, Wei W, Huang W. Two novel oligomers based on fluorene and pyridine: Correlation between the structures and optoelectronic properties. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22311] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
25
|
|
26
|
|
27
|
Vuković J, Lechner MD, Jovanović S. Rheological Properties of Concentrated Solutions of Aliphatic Hyperbranched Polyesters. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200700262] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
28
|
Properties of aliphatic hyperbranched polyesters in dilute solutions. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2007. [DOI: 10.2298/jsc0712493v] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The results of an investigation of the influence of the synthesis procedure, number of pseudo generations and degree of branching of hydroxy-functional aliphatic hyperbranched polyesters (AHBP) on the values of limiting viscosity number, [?], hydrodynamic radius, R?, molar mass and polydispersity index, Q, are presented in this paper. Two series of AHBP, synthesized from 2,2-bis(hydroxymethyl) propionic acid and di-trimethylolpropane using a pseudo-one-step and a one-step procedure were investigated. The obtained results show that the values of [?] and R? for all examined samples are the highest in a 0.7 mass % solution of LiCl in N,N-dimethylacetamide (LiCl/DMAc), which indicates that this solvent is the best from the investigated ones. The values of [?] in N-methyl-2-pyrrolidinone (NMP) increased up to the sixth pseudo generation, after which a slight decrease occurred as the consequence of the presence of side-reaction products, formed during the synthesis. The appearance of these side-reaction products was also confirmed from the characteristic GPC chromatograms. For the samples of AHBP synthesized using the pseudo- one-step procedure, a good linear dependence between log [?] and log Mw was obtained up to the fifth pseudo generation, when LiCl/DMAc, NMP and DMAc were used as solvents. The values of the "shrinking" factor, g?, were calculated for all investigated AHBPs.
Collapse
|