Thermo-, pH-, and light-responsive supramolecular complexes based on a thermoresponsive hyperbranched polymer

Jing Zhang; Hua Ji Liu; Yuan Yuan; Songzi Jiang; Yefeng Yao; Yu Chen

doi:10.1021/mz300613q

Thermo-, pH-, and light-responsive supramolecular complexes based on a thermoresponsive hyperbranched polymer

Jing Zhang, Hua Ji Liu, Yuan Yuan, Songzi Jiang, Yefeng Yao, Yu Chen

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Hyperbranched polyethylenimine terminated with isobutyramide groups (HPEI-IBAm) was mixed with 4-(phenylazo)benzoic acid (PABA) to form supramolecular complexes through the neutralization reaction between the amino groups of HPEI-IBAm and the carboxylic acid group of PABA, which was verified by ¹H and 2D NOESY ¹H NMR spectroscopy. The obtained supramolecular complexes with a molar ratio of PABA to HPEI-IBAm of ≤8 were soluble in water and exhibited thermoresponsive properties. Their cloud point temperature (T_cp) was sensitive to PABA content, and PABA molecules were exchanged between HPEI-IBAm hosts. The topology of the polymer affected the change in T_cp of the complexes. At pH ∼7, increasing the PABA content decreased T_cp, whereas it caused T_cp to increase at pH ∼9. Reversible trans-to-cis photoisomerization of azobenzene units in the complexes occurred following irradiation with UV or visible light. At pH ∼7, trans-to-cis isomerization of azobenzene units increased T_cp, whereas the opposite occurred at pH ∼9.

Original language	English
Pages (from-to)	67-71
Number of pages	5
Journal	ACS Macro Letters
Volume	2
Issue number	1
DOIs	https://doi.org/10.1021/mz300613q
State	Published - 15 Jan 2013

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@article{f0d228321cef418581f08325a190bd1a,

title = "Thermo-, pH-, and light-responsive supramolecular complexes based on a thermoresponsive hyperbranched polymer",

abstract = "Hyperbranched polyethylenimine terminated with isobutyramide groups (HPEI-IBAm) was mixed with 4-(phenylazo)benzoic acid (PABA) to form supramolecular complexes through the neutralization reaction between the amino groups of HPEI-IBAm and the carboxylic acid group of PABA, which was verified by 1H and 2D NOESY 1H NMR spectroscopy. The obtained supramolecular complexes with a molar ratio of PABA to HPEI-IBAm of ≤8 were soluble in water and exhibited thermoresponsive properties. Their cloud point temperature (Tcp) was sensitive to PABA content, and PABA molecules were exchanged between HPEI-IBAm hosts. The topology of the polymer affected the change in Tcp of the complexes. At pH ∼7, increasing the PABA content decreased Tcp, whereas it caused Tcp to increase at pH ∼9. Reversible trans-to-cis photoisomerization of azobenzene units in the complexes occurred following irradiation with UV or visible light. At pH ∼7, trans-to-cis isomerization of azobenzene units increased Tcp, whereas the opposite occurred at pH ∼9.",

author = "Jing Zhang and Liu, \{Hua Ji\} and Yuan Yuan and Songzi Jiang and Yefeng Yao and Yu Chen",

year = "2013",

month = jan,

day = "15",

doi = "10.1021/mz300613q",

language = "英语",

volume = "2",

pages = "67--71",

journal = "ACS Macro Letters",

issn = "2161-1653",

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TY - JOUR

T1 - Thermo-, pH-, and light-responsive supramolecular complexes based on a thermoresponsive hyperbranched polymer

AU - Zhang, Jing

AU - Liu, Hua Ji

AU - Yuan, Yuan

AU - Jiang, Songzi

AU - Yao, Yefeng

AU - Chen, Yu

PY - 2013/1/15

Y1 - 2013/1/15

N2 - Hyperbranched polyethylenimine terminated with isobutyramide groups (HPEI-IBAm) was mixed with 4-(phenylazo)benzoic acid (PABA) to form supramolecular complexes through the neutralization reaction between the amino groups of HPEI-IBAm and the carboxylic acid group of PABA, which was verified by 1H and 2D NOESY 1H NMR spectroscopy. The obtained supramolecular complexes with a molar ratio of PABA to HPEI-IBAm of ≤8 were soluble in water and exhibited thermoresponsive properties. Their cloud point temperature (Tcp) was sensitive to PABA content, and PABA molecules were exchanged between HPEI-IBAm hosts. The topology of the polymer affected the change in Tcp of the complexes. At pH ∼7, increasing the PABA content decreased Tcp, whereas it caused Tcp to increase at pH ∼9. Reversible trans-to-cis photoisomerization of azobenzene units in the complexes occurred following irradiation with UV or visible light. At pH ∼7, trans-to-cis isomerization of azobenzene units increased Tcp, whereas the opposite occurred at pH ∼9.

AB - Hyperbranched polyethylenimine terminated with isobutyramide groups (HPEI-IBAm) was mixed with 4-(phenylazo)benzoic acid (PABA) to form supramolecular complexes through the neutralization reaction between the amino groups of HPEI-IBAm and the carboxylic acid group of PABA, which was verified by 1H and 2D NOESY 1H NMR spectroscopy. The obtained supramolecular complexes with a molar ratio of PABA to HPEI-IBAm of ≤8 were soluble in water and exhibited thermoresponsive properties. Their cloud point temperature (Tcp) was sensitive to PABA content, and PABA molecules were exchanged between HPEI-IBAm hosts. The topology of the polymer affected the change in Tcp of the complexes. At pH ∼7, increasing the PABA content decreased Tcp, whereas it caused Tcp to increase at pH ∼9. Reversible trans-to-cis photoisomerization of azobenzene units in the complexes occurred following irradiation with UV or visible light. At pH ∼7, trans-to-cis isomerization of azobenzene units increased Tcp, whereas the opposite occurred at pH ∼9.

UR - https://www.scopus.com/pages/publications/84872552817

U2 - 10.1021/mz300613q

DO - 10.1021/mz300613q

M3 - 文章

AN - SCOPUS:84872552817

SN - 2161-1653

VL - 2

SP - 67

EP - 71

JO - ACS Macro Letters

JF - ACS Macro Letters

IS - 1

ER -

Thermo-, pH-, and light-responsive supramolecular complexes based on a thermoresponsive hyperbranched polymer

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