Thermosensitive copolymer with cobalt phthalocyanine and catalytic behavior based on adjustable LCST

Lu, Wei; Zhao, Baojun; Li, Nan; Yao, Yingming

doi:10.1016/j.reactfunctpolym.2009.11.002

Cited by 12 publications

(6 citation statements)

References 36 publications

(37 reference statements)

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“…6a. Based on the previously reported thermal decomposition behavior of metal phthalocyanine materials, decomposition begins at temperatures above 220 C, with minor and major decomposition for FePc occuring at 220 and 275 C, respectively [46,47]. For Fe-TCNB/C, the majority of weight loss occurs from 240 to 260 C, with some losses as lower and higher temperatures, corresponding well to the reported values.…”

Section: Resultssupporting

confidence: 86%

“…400 C underwent physical cross-linking, forming the polymeric phtalocyanine matrix on the surface of carbon. This cross-linking leads to enhanced thermal stability, with decomposition of these species not observed until the temperature reaches 700 C [47,48]. To evaluate the effect of different pyrolysis temperatures on the as-prepared catalysts, TGA under oxygen was carried out, with curves illustrating the percentage weight remaining versus temperature displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Iron-tetracyanobenzene complex derived non-precious catalyst for oxygen reduction reaction

Choi

Higgins

Jiang

et al. 2015

Electrochimica Acta

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Iron-tetracyanobenzene complex derived non-precious catalyst for oxygen reduction reaction

Choi

Higgins

Jiang

et al. 2015

Electrochimica Acta

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“…24 Basically, the two main absorption regions at 300-400 nm and at 600-800 nm correspond to the Bband and Q-band of metallophthalocyanines, respectively. [28][29][30] The 400-600 nm region is the valley of the ground-state linear absorption spectrum where the reverse saturation absorption occurs. 28 For Q-band in DMSO, λ max is nearly 680, 700 and 710 nm for AuPc, AuPc-(CN) 8 and AuPc-(COOH) 8 , respectively.…”

Section: Resultsmentioning

confidence: 99%

New Insights into the Physicochemical and Electrochemical Characterization of Gold Phthalocyanine-Based Materials

Nitiema,

Ouemega,

Lacour

et al. 2023

J. Electrochem. Soc.

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Gold phthalocyanine-based materials can allow to combine the unique physical properties of the metallophthalocyanine with gold for numerous applications such as (photo)-electrochemistry or the so-called single atom catalysts (SACs), which require very small amounts of metal. However, there is currently a lack of physico-chemical and electrochemical knowledge to consider such applications. We report the synthesis and the physical characterization of three types of materials, the unsubstituted and the octo-substituted gold phthalocyanines AuPc, AuPc(CN)8 and AuPc(COOH)8, which were successfully synthesized. To interrogate the physicochemical and electrochemical properties of the as-synthesized materials, we have performed a multi-variant study by integrating different methods (UV–vis, FTIRS, TGA-TDA, HR-ESI-MS, SEM-EDX, XRD, XPS, CV). UV–vis confirms the shift towards high wavelengths (bathochromic effect) for the transition Q-band (charge transfer from pyrrolic carbons to neighboring atoms in the macrocycle) of AuPc(CN)8 and AuPc(COOH)8 compared to AuPc. CV in both aqueous and non-aqueous provides the first electrochemical insights into the phthalocyanine ring reduction and oxidation, AuPc/[AuPc]−, [AuPc]−/[AuPc]2− and [AuPc]2−/[AuPc]3−. The results delineate a possible rational pathway for AuPc-based materials or alternatively, their transformation into SACs, where a single Au atom is embedded in a nanostructured carbon-nitrogen scaffold.

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“…Thermoresponsive polymers displaying lower critical solubility temperature (LCST) in water have been intensively researched within the last years due to their potential uses in many fields, including tissue engineering, controlled release of therapeutics, cell growth, rheology modifiers, chemical valves and sensors, catalysts, smart textiles [1][2][3][4][5][6][7][8][9][10]. The aqueous solution of such polymers phase separates when heated above a certain temperature called the phaseseparation temperature (T ph ) due to the hydrophilichydrophobic transition of the polymer, converting to a gel if the concentration is high enough [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Novel Thermoreversible Injectable Hydrogel Formulations Based on Sodium Alginate and Poly(N-Isopropylacrylamide)

Teodorescu

Mihai

Turturicǎ

et al. 2015

International Journal of Polymeric Materials and Polymeric Biom

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Novel injectable thermoreversible hydrogel compositions with semi-interpenetrating network structure were prepared through the addition of sodium alginate (SA) to poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions. The addition of the hydrophilic alginate strongly improved the stability against syneresis of the 15 wt% PNIPAM hydrogels formed at 37 C from less than 15 min in the absence of alginate to more than 7 days in the presence of 4 wt% SA. Besides the SA concentration, the hydrogel stability depended on the molecular weight and polydispersity of PNIPAM, being lower when a high molecular weight fraction was present. The phase transition temperature (T ph ) of the PNIPAM aqueous solutions decreased with alginate concentration, while the dynamic viscosity and elastic modulus of the hydrogels increased. By decreasing the PNIPAM molecular weight and polydispersity, the dynamic viscosity and elastic modulus of the PNIPAM-alginate hydrogels formed above T ph diminished, while their viscoelastic behavior changed from predominantly elastic to predominantly viscous.

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Thermosensitive copolymer with cobalt phthalocyanine and catalytic behavior based on adjustable LCST

Cited by 12 publications

References 36 publications

Iron-tetracyanobenzene complex derived non-precious catalyst for oxygen reduction reaction

Iron-tetracyanobenzene complex derived non-precious catalyst for oxygen reduction reaction

New Insights into the Physicochemical and Electrochemical Characterization of Gold Phthalocyanine-Based Materials

Novel Thermoreversible Injectable Hydrogel Formulations Based on Sodium Alginate and Poly(N-Isopropylacrylamide)

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