Thin films of tetrafluorosubstituted cobalt phthalocyanine: Structure and sensor properties

Klyamer, Darya; Sukhikh, A. S.; Краснов, Павел О.; Gromilov, S. A.; Morozova, N. B.; Basova, Tamara V.

doi:10.1016/j.apsusc.2016.03.066

Cited by 68 publications

(53 citation statements)

References 57 publications

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“…Such a spectrum with unsplitted Q band was observed only for ultrathin (0.7-1 nm) ZnPcF 16 films deposited on quartz glass and points toward a cofacial parallel arrangement of chromophores [32,33]. Thicker films of MPcF 16 (M=Cu(II), Co(II), Zn(II)) usually exhibits absorption bands located at about 650 and 770 nm [14,20,[33][34][35], where the lower energy absorption band shows a maximum in intensity. In general a bathochromic shift of the absorption band relative to the absorption of the solution is characteristic for a "head-to-tail" arrangement of chromophores [30].…”

Section: Study Of Sensor Propertiesmentioning

confidence: 98%

“…The binding parameters of NH 3 with PdPc and PdPcF 16 were then estimated as described elsewhere [14]. Similar estimation was applied in the case of …”

Section: Deposition and Characterization Of Thin Filmsmentioning

confidence: 99%

“…It is known that ammonia and amines interact with the central metal ion inside the phthalocyanine ring and form complexes with charge transfer from NH 3 to phthalocyanine molecule [14,39,40]. At the same time the introduction of F-atoms in PdPc macrocycles causes a decrease of the bond length d(Pd-NH 3 ) between palladium atom and nitrogen atom of ammonia ( Table 1) It is however worth remembering that the surface morphologies of PdPc and PdPcF 16 films are quite different from each other (Fig.…”

Section: Theoretical Study Of Ammonia Binding To Palladium Phthalocyamentioning

confidence: 99%

“…This makes fluorine substituted phthalocyanines possessing more sensitivity to the reducing gases like NH 3 and H 2 as compared to unsubstituted analogues [13,14,17]. Although the structural features and sensor response of 3 some fluorosubstituted M(II)Pc (e.g., CuPc, ZnPc, CoPc) were studied in details [14,[18][19][20][21], much less seems to be known about fluorosubstituted palladium phthalocyanines.…”

Section: Introductionmentioning

confidence: 99%

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Thin Films of Unsubstituted and Fluorinated Palladium Phthalocyanines: Structure and Sensor Response toward Ammonia and Hydrogen

et al. 2017

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In the present work, we study and compare the structure and sensing properties of thin films of unsubstituted palladium phthalocyanine (PdPc) and hexadecafluorosubstituted palladium phthalocyanine (PdPcF 16 ). Thin films of PdPc and PdPcF 16 were obtained by the method of organic molecular beam deposition and their structure was studied using UV-visible spectroscopy, X-ray diffraction and atomic force microscopy techniques. The electrical sensor response of PdPc films toward ammonia and hydrogen was investigated and compared with that of PdPcF 16 films. The nature of interaction between the phthalocyanines films and some gaseous analyte molecules has been clarified using Quantum chemical (DFT) calculations.

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Section: Study Of Sensor Propertiesmentioning

confidence: 98%

“…The binding parameters of NH 3 with PdPc and PdPcF 16 were then estimated as described elsewhere [14]. Similar estimation was applied in the case of …”

Section: Deposition and Characterization Of Thin Filmsmentioning

confidence: 99%

Section: Theoretical Study Of Ammonia Binding To Palladium Phthalocyamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thin Films of Unsubstituted and Fluorinated Palladium Phthalocyanines: Structure and Sensor Response toward Ammonia and Hydrogen

et al. 2017

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“…Using DFT calculations and spectral investigation, it has been shown that ammonia and amines interacts with the central metal ion inside the phthalocyanine ring and pr eferably forms a five-coordinated complex with MPcs with charge transfer to phthalocyanine molecule [49][50][51][52]. The electron charge transfers from electron donor NH 3 molecule to MPc resulting in a decrease of the holes density, hence causing a marked increase in the film's resistance [53].…”

Section: Comparative Study Of the Sensor Properties Of Cupc Filmsmentioning

confidence: 99%

Tetrasubstituted copper phthalocyanines: Correlation between liquid crystalline properties, films alignment and sensing properties

Gülmez

Polyakov

Volchek

et al. 2017

Sensors and Actuators B: Chemical

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Copper phthalocyanines (CuPc) containing alkylthio (-S(CH 2) n CH 3 , n=7 and 15), alkyloxy-(-O(CH 2) n CH 3 , n=7 and 15) and polyoxo (-O(CH 2 CH 2 O) 3 CH 3 and-S(CH 2 CH 2 O) 3 CH 3) substituents were synthesized and investigated to reveal the effects of substituents type (alkylthio, alkyloxy and polyoxo) and the type of the connecting heteroatom (oxygen or sulphur) on the mesogenic properties, films alignment and sensing behaviour. The liquid crystalline properties of these phthalocyanines were investigated by differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction techniques. The structure and morphology of spun thin films of copper phthalocyanine derivatives were studied by the UV-Vis and Raman spectroscopies as well atomic force microscopy. The sensing properties of CuPc films were studied by the measurement of conductivity change upon interaction with ammonia in the range 10-50 ppm. All investigated films of CuPc derivatives display thermotropic columnar mesomorphism. It was shown that the films with polyoxo-(-O(CH 2 CH 2 O) 3 CH 3 and-S(CH 2 CH 2 O) 3 CH 3) substituents as well as with alkylthio-S(CH 2) n CH 3 (n=7) substituents, which are liquid crystalline at room temperature, form ordered films with a random planar alignment of columns. Their films exhibit the better sensor performance with the maximal sensor response for the films of CuPc containing (-S(CH 2 CH 2 O) 3 CH 3) substituents.

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Atomic‐ and Molecular‐Level Modulation of Dispersed Active Sites for Electrocatalytic CO₂Reduction

Juthathan

Chantarojsiri

Tuntulani

et al. 2022

Chemistry An Asian Journal

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Global climate changes have been impacted by the excessive CO 2 emission, which exacerbates the environmental problems. Electrocatalytic CO 2 reduction (CO 2 RR) offers the solution for utilising CO 2 as feedstocks for value-added products while potentially mitigating the negative effects. Owing to the extreme stability of CO 2 , selectivity and efficiency are crucial factors in the development of CO 2 RR electrocatalysts. Recently, single-atom catalysts have emerged as potential electrocatalysts for CO 2 reduction. They generally comprise of atomically-and molecularly dispersed active sites over conductive supports, which enable atomiclevel and molecular-level modulations. In this minireview, catalyst preparations, principle of modulations, and reaction mechanisms are summarised together with related recent advances. The atomic-level modulations are first discussed, followed by the molecular-level modulations. Finally, the current challenges and future opportunities are provided as guidance for further developments regarding the discussed topics.

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Thin films of tetrafluorosubstituted cobalt phthalocyanine: Structure and sensor properties

Cited by 68 publications

References 57 publications

Thin Films of Unsubstituted and Fluorinated Palladium Phthalocyanines: Structure and Sensor Response toward Ammonia and Hydrogen

Thin Films of Unsubstituted and Fluorinated Palladium Phthalocyanines: Structure and Sensor Response toward Ammonia and Hydrogen

Tetrasubstituted copper phthalocyanines: Correlation between liquid crystalline properties, films alignment and sensing properties

Atomic‐ and Molecular‐Level Modulation of Dispersed Active Sites for Electrocatalytic CO₂Reduction

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Thin films of tetrafluorosubstituted cobalt phthalocyanine: Structure and sensor properties

Cited by 68 publications

References 57 publications

Thin Films of Unsubstituted and Fluorinated Palladium Phthalocyanines: Structure and Sensor Response toward Ammonia and Hydrogen

Thin Films of Unsubstituted and Fluorinated Palladium Phthalocyanines: Structure and Sensor Response toward Ammonia and Hydrogen

Tetrasubstituted copper phthalocyanines: Correlation between liquid crystalline properties, films alignment and sensing properties

Atomic‐ and Molecular‐Level Modulation of Dispersed Active Sites for Electrocatalytic CO2Reduction

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Atomic‐ and Molecular‐Level Modulation of Dispersed Active Sites for Electrocatalytic CO₂Reduction