Photochemically deoxygenating gels for triplet-triplet annihilation photon-upconversion performed under air

Zhou, Hongqi1; Lin, Jinxiong1; Wan, Shigang2; Lu, Wei1

2022-12-07

10.1039/d2cp04532j

PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Impact Factor & Quartile

1463-9076

1463-9084

For an efficient triplet-triplet annihilation photon upconversion (TTA-UC) process, matrices in which sensitizers and emitters are dispersed should not only allow molecular diffusions but also protect triplet excited states from oxygen-quenching. In this work, two photochemically deoxygenating gels, a poly(N-vinyl-2-pyrrolidone) (PVP) gel and a limonene gel, were prepared for TTA-UC performed under air. These two gels are optically transparent in the visible region and can serve as a scavenger for sensitized singlet oxygen. For the green-to-blue couple of platinum(ii) octaethylporphyrin (Pt(OEP)) and 9,10-diphenylanthracene (DPA), under air, the bimolecular quenching rate constants were 6.73 x 10(8) dm(3) mol(-1) s(-1) for the PVP gel and 1.54 x 10(9) dm(3) mol(-1) s(-1) for the limonene gel, and the upconversion quantum yields were 9.1% and 1.9% in PVP and limonene gels, respectively. As matrices, the PVP gel can be employed in NIR-to-yellow, red-to-cyan, green-to-blue and blue-to-violet TTA-UC systems operating under air. TTA-UC systems of Pt(OEP)/DPA in PVP or limonene gels showed strong upconverted emission under air with non-coherent light of low optical power density as the excitation source.

SCI

English

First ; Corresponding

[21873044] ; [22003025] ; [JCYJ20190809162011645] ; [2019B030302009]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000891515900001

ROYAL SOC CHEMISTRY

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
2.Suzhou Univ Sci & Technol, Sch Mat Sci & Engn, Suzhou 215009, Peoples R China

Zhou, Hongqi,Lin, Jinxiong,Wan, Shigang,et al. Photochemically deoxygenating gels for triplet-triplet annihilation photon-upconversion performed under air[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2022,24(47).

Zhou, Hongqi,Lin, Jinxiong,Wan, Shigang,&Lu, Wei.(2022).Photochemically deoxygenating gels for triplet-triplet annihilation photon-upconversion performed under air.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,24(47).

Zhou, Hongqi,et al."Photochemically deoxygenating gels for triplet-triplet annihilation photon-upconversion performed under air".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 24.47(2022).