1372879-79-2Relevant academic research and scientific papers
Accessing the long-lived near-IR-emissive triplet excited state in naphthalenediimide with light-harvesting diimine platinum(ii) bisacetylide complex and its application for upconversion
Liu, Yifan,Wu, Wanhua,Zhao, Jianzhang,Zhang, Xin,Guo, Huimin
, p. 9085 - 9089 (2011)
Room temperature near-IR phosphorescence of naphthalenediimide (NDI) was observed with NN Pt(ii) bisacetylide complex (Pt-NDI) in which the NDI was connected to Pt(ii) center via acetylide. Pt-NDI shows intense absorption of visible light and long-lived NDI-localized excited state (3IL) (τT = 22.3 μs). Pt-NDI was used as a triplet sensitizer for upconversion.
Visible light-harvesting naphthalenediimide (NDI)-C60 dyads as heavy-Atom-free organic triplet photosensitizers for triplet-triplet annihilation based upconversion
Guo, Song,Sun, Jifu,Ma, Lihua,You, Wenqin,Yang, Pei,Zhao, Jianzhang
, p. 449 - 458 (2013/02/23)
Two naphthalenediimide (NDI)-C60 dyads that show strong absorption of visible light were prepared as heavy atom-free organic triplet photosensitizers. Alkylamino substituted NDI was used as the light-harvesting antennas and the C60 unit was used as spin converter for the intersystem crossing (ISC) from singlet excited state to triplet excited state. Upon visible light photoexcitation, triplet excited states of the dyads are populated (lifetime is up to 90.1 μs). Nanosecond time-resolved transient difference absorption spectroscopy indicated that the triplet excited state of the dyads is localized on either the NDI or the C60 unit. As a proof of concept, the dyads are used as heavy-Atom-free organic triplet photosensitizers for triplet-triplet annihilation based upconversion. C 60-organic chromophore dyads can be used as a general molecular structural motif of heavy-Atom-free organic triplet photosensitizers, for which the photophysical properties can be readily changed by using different light-harvesting antennas, and the ISC property of these dyads is predictable.
