Synthesis, characterization and photovoltaic behavior of platinum acetylide polymers with electron-deficient 9,10-anthraquinone moiety

Li, Li; Chow, Wing Cheong; Wong, Wai Yeung; Chui, Chung Hin; Wong, Raymond Siu Ming

doi:10.1016/j.jorganchem.2010.08.044

Cited by 41 publications

(6 citation statements)

References 72 publications

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“…Afterwards, cells were washed again with acetic acid, and stained cells were dissolved in unbuffered Tris-base. Finally, optical absorptions were measured at 575 nm using a Perkin Elmer Victor V microplate reader (Li et al, 2011). The 50% inhibitory concentrations of corilagin, cisplatin and doxorubicin were finally calculated from these experimental results.…”

Section: Methodsmentioning

confidence: 99%

Sensitization of Hep3B hepatoma Cells to Cisplatin and Doxorubicin by Corilagin

et al. 2013

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The anticancer action of gallotannins is a well-developed topic. We have demonstrated the in vivo antitumour activity of corilagin on Hep3B hepatoma using the xenograft athymic nude mice model. Here, we further report the potential sensitization of Hep3B hepatoma cells to cisplatin and doxorubicin by corilagin. Our results showed that corilagin is able to enhance the cytotoxicity of both cisplatin and doxorubicin on the Hep3B hepatoma cells. We speculate the possible use of corilagin in combination with low dosages of the anticancer chemotherapeutic standard drugs like cisplatin and doxorubicin, with the aim of obtaining an increment in the anticancer effect.

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Section: Methodsmentioning

confidence: 99%

Sensitization of Hep3B hepatoma Cells to Cisplatin and Doxorubicin by Corilagin

et al. 2013

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“…Polymetallaynes emerged in recent years as materials belonging to one of the most stimulating research areas. , These soluble and stable polymers feature the well-known advantages of organic polymers, together with the functionality provided by the presence of metal centers, linked through a π-conjugated moiety. Polymetallaynes find broad applicability in electronic and electro-optical devices, including chemical sensors, − organic light emitting devices (OLEDs), and photovoltaics. , Despite the wide number of reported properties and applications, studies on the behavior of these materials under γ-ray irradiation are unknown; the degradation of polymetallaynes is not understood in detail and, to our knowledge, there are no reports on their use as a dosimeter.…”

Section: Introductionmentioning

confidence: 99%

Optical Behavior of Conjugated Pt-Containing Polymetallaynes Exposed to Gamma-Ray Radiation Doses

et al. 2011

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The effect of (60)Co γ irradiation on the absorption and emission spectra of the organometallic polymer [-Pt(PBu(3))(2)-C≡C-C(6)H(4)-C(6)H(4)-C≡C-](n) (Pt-DEBP) in chloroform and toluene solutions for dosimetry applications has been studied. The system Pt-DEBP/chloroform can be used for dosimetric applications in two different ways: (i) monitoring of absorption spectra changes for higher doses (higher than 1 Gy), and (ii) monitoring of emission spectra changes for low doses (below 1 Gy). The response of the polymer solution to γ ray doses has been interpreted with the aid of theoretical studies based on time dependent density functional theory (TD-DFT) calculations on the absorption bands of a model complex and of the possible fragments coming from the degradation of the polymer backbone. It has been proposed that the observed changes are promoted by the attack of radicals, from the radiolysis of the solvent, on the polymer triple bonds.

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“…The trans -bisethynylbis(trialkylphosphine)platinum(II) building block, [Pt] , is a versatile unit for the design of photonic materials showing potential applications in nonlinear optics − and light-emitting diodes. − In the field of solar cells, the [Pt] -containing materials are also active irrespective of whether they are used as molecules or within polymer chains. , Indeed, dye-sensitized solar cells − and bulk heterojunction solar cells (BHJSCs) − were designed. To the best of our knowledge, the highest photoconversion efficiency (PCE) was recently reported to be 5.29% for a BHJSC containing the [Pt] moiety. , Concurrently, studies on complexes bearing [Pt] units indicated that the charge separated states are formed in the short picosecond (ps) time scale − and that the [Pt] unit could mediate the electron transfer. − Over the years, it was suggested that anchoring diphenylamine pendants as electron-rich groups , and using the electron-deficient anthraquinone, AQ , moiety , should improve the PCEs of [Pt] -containing materials for solar cells. Alternatively to ( [Pt] - [AQ] ) n polymers, polymers containing anthraquinone diimine, AQI (i.e., ( [Pt]-[AQI] ) n ), were also designed. , These latter materials are nonemissive at room temperature (RT), but exhibit both low potential oxidation and reduction processes, , rendering them suitable for photoinduced electron transfers processes.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Photoinduced Electron Transfers in Platinum(II)-Anthraquinone Diimine Polymer/PCBM Films

Juvenal

Schlachter

et al. 2019

J. Phys. Chem. C

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Two fluorescent polymers ([Pt]-(AQI(BM-PA) x )) n ([Pt] = trans-bis(ethynylbenzene)-bis-(tributylphosphine)platinum(II); AQI = anthraquinone diimine; BMPA = bis(para-methoxyphenyl)amine), P1 (x = 1; τ F ≤ 8 ps) and P2 (x = 2; τ F = 10 ps, 298 K), were prepared and investigated as thin films in the presence of phenyl-C 61butyric acid methyl ester (PCBM) to probe the photoinduced electron transfer processes using steady-state and timeresolved fluorescence and femtosecond-transient absorption spectroscopy (fs-TAS). P1 and P2 undergo an efficient oxidative photoinduced electron transfer (Px* + PCBM → Px +• + PCBM −• ; x = 1, 2) in solution and as films. Based on fs-TAS, the time scale for the photogenerated charge separated state forms within the excitation pulse (i.e., ≤150 fs). During the course of this study, the nature of the lowest energy emissive excited state was identified as a charge transfer state defined as [Pt] → AQI (major component) and BMPA → AQI (minor component) with the aid of density functional theory (DFT) and time-dependent DFT computations.

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Synthesis, characterization and photovoltaic behavior of platinum acetylide polymers with electron-deficient 9,10-anthraquinone moiety

Cited by 41 publications

References 72 publications

Sensitization of Hep3B hepatoma Cells to Cisplatin and Doxorubicin by Corilagin

Sensitization of Hep3B hepatoma Cells to Cisplatin and Doxorubicin by Corilagin

Optical Behavior of Conjugated Pt-Containing Polymetallaynes Exposed to Gamma-Ray Radiation Doses

Ultrafast Photoinduced Electron Transfers in Platinum(II)-Anthraquinone Diimine Polymer/PCBM Films

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