biostudies-literatureRen YNatural Science Foundation of Beijing Municipality (Beijing Natural Science Foundation)National Natural Science Foundation of China (National Science Foundation of China)11120https://www.ebi.ac.uk/biostudies/studies/S-EPMC12705653biostudies-literatureUnknown16(1)Near-infrared room-temperature phosphorescent (NIR-RTP) materials feature the advantages of large Stokes shift, long emission lifetime, and high penetration ability, and have been broadly applied in bio-medical imaging, fiber optic telecommunication, and night vision-readable display. Developing organic NIR-RTP materials heavily relies on the long-conjugated chemical structures. The large conjugation could result in aggregation caused quenching, complex synthesis, poor processability, and high biological toxicity. Herein, by solution blending poly(iminofuran-spiro-pyrrolone) (PISP) with polystyrene (PS), we construct a nonconventional NIR-RTP polymer alloy without significantly extensive conjugation. The PISP was synthesized via a catalyst-free multicomponent polymerization in air with high molecular weights (up to 41000 g/mol) and decent yields (up to 84%). Although lacking classical luminescent segments and largely extended conjugation, PISPs exhibit the clusterization-triggered cryogenic phosphorescence. More importantly, upon solution blending PISP with PS, the resultant polymer alloy shows a NIR-RTP emission up to 715 nm with a Stokes shift of 375 nm. This work will be of interest for developing luminescent materials for the optoelectronic devices, in vivo imaging, and flexible electronics.Nature communicationsNonconventional near-infrared room-temperature phosphorescent materials based on spiropolymer alloy.PMC127056532232022224206052403006524732902222250122401017Zhi JDong YRen YDai WSu HZhao YYan WTong BSun PZhang YZhu LWang TCai ZShi JfalseNonconventional near-infrared room-temperature phosphorescent materials based on spiropolymer alloy.Near-infrared room-temperature phosphorescent (NIR-RTP) materials feature the advantages of large Stokes shift, long emission lifetime, and high penetration ability, and have been broadly applied in bio-medical imaging, fiber optic telecommunication, and night vision-readable display. Developing organic NIR-RTP materials heavily relies on the long-conjugated chemical structures. The large conjugation could result in aggregation caused quenching, complex synthesis, poor processability, and high biological toxicity. Herein, by solution blending poly(iminofuran-spiro-pyrrolone) (PISP) with polystyrene (PS), we construct a nonconventional NIR-RTP polymer alloy without significantly extensive conjugation. The PISP was synthesized via a catalyst-free multicomponent polymerization in air with high molecular weights (up to 41000 g/mol) and decent yields (up to 84%). Although lacking classical luminescent segments and largely extended conjugation, PISPs exhibit the clusterization-triggered cryogenic phosphorescence. More importantly, upon solution blending PISP with PS, the resultant polymer alloy shows a NIR-RTP emission up to 715 nm with a Stokes shift of 375 nm. This work will be of interest for developing luminescent materials for the optoelectronic devices, in vivo imaging, and flexible electronics.2025-01-01T00:00:00Z2025 Nov2026-06-07T05:06:03.542Z2026-06-07T03:07:02.416ZS-EPMC127056534129842210.1038/s41467-025-66035-w