Synthesis of Amphiphilic Block Codendrimers Gx-PBE-b-Gx-PMPA(OH)x2 and Study on Temperature Dependence of Multiple Hydrogen Bonds

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (11): 2667.

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Synthesis of Amphiphilic Block Codendrimers Gx-PBE-b-Gx-PMPA(OH)x2 and Study on Temperature Dependence of Multiple Hydrogen Bonds

YUAN Fei, LI Qiu-Yue, WANG Wei*

Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China

Received:2011-03-15 Revised:2011-05-23 Online:2011-11-10 Published:2011-10-14
Contact: WANG Wei E-mail:weiwang@nankai.edu.cn
Supported by:
国家自然科学基金(批准号: 20734001)资助.

Abstract

Abstract: Block codendrimers Gx-PBE-b-Gx-PMPA were synthesized through a coupling reaction between Gx-PBE dendrons and Gx-PMPA dendrons(x=1, 2, 3). Amphiphlic block codendrimers Gx-PBE-b-Gx-PMPA(OH)x2 were further prepared through removing acetonide protecting groups on the periphery of the Gx-PMPA blocks. Their chemical structures were characterized by 1H NMR and 13C NMR spectroscopies, MALDI-TOF(or FD) mass spectroscopy and FTIR spectroscopy. Meanwhile, FTIR spectrometer equipped with a heating stage was used to study the change of the hydrogen bonds in-between hydroxyl groups with increasing temperature. A widened transition region with increasing dendron generation was found. This result can indicate that with increasing dendron generation the ability of forming intermolecular hydrogen bonds decrease due to the three-dimensional structure of higher generation dendron.

Key words: Amphiphile, Dendrimer, Hydrongen bond

CLC Number:

O631

TrendMD:

YUAN Fei, LI Qiu-Yue, WANG Wei*. Synthesis of Amphiphilic Block Codendrimers Gx-PBE-b-Gx-PMPA(OH)x2 and Study on Temperature Dependence of Multiple Hydrogen Bonds[J]. Chem. J. Chinese Universities, 2011, 32(11): 2667.

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Synthesis of Amphiphilic Block Codendrimers Gx-PBE-b-Gx-PMPA(OH)x2 and Study on Temperature Dependence of Multiple Hydrogen Bonds

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