Phase separation and pH-dependent behavior of four-arm star-shaped porphyrin-PNIPAM4 conjugates
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00556292" target="_blank" >RIV/61389013:_____/22:00556292 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/22:10452650 RIV/00216208:11310/22:10452650
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.macromol.1c02188" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.macromol.1c02188</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.macromol.1c02188" target="_blank" >10.1021/acs.macromol.1c02188</a>
Alternative languages
Result language
angličtina
Original language name
Phase separation and pH-dependent behavior of four-arm star-shaped porphyrin-PNIPAM4 conjugates
Original language description
Star-shaped porphyrin-PNIPAM4 (PP) conjugates having four PNIPAM arms connected to a central tetraphenylporphyrin unit were synthesized using reversible addition–fragmentation chain-transfer polymerization. Temperature-induced phase-separation behavior of the conjugates was investigated, and the lower critical solution temperature (type II)–composition phase diagram was constructed using Flory–Huggins theory. Interestingly, in contrast to PNIPAM homopolymers, the shorter PNIPAM arms of PP conjugates lead to a lower phase-separation temperature (Tp). The concentration dependency of the size of the cooperative domain was also determined. Below Tp, experimental data indicate that PP behaves as a 1D supramolecular polymer with a concentration-dependent length, while above Tp, PP globules adopt a larger spherical shape. Various temperature–pH reversible and irreversible interdependencies (“cross-effects”) between phase separation and protonation were observed. The PP conjugates represent a dual temperature–pH-responsive model system possessing various aggregated states, making them candidates for visual indicators, pH or temperature sensors, or singlet oxygen generators for biomedical applications.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Macromolecules
ISSN
0024-9297
e-ISSN
1520-5835
Volume of the periodical
55
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
2109-2122
UT code for WoS article
000775805500019
EID of the result in the Scopus database
2-s2.0-85126600773