TY - JOUR

T1 - Investigation of Aggregation-Induced Phosphorescence of Non-Symmetric [Pt(C^N*N′^C′)] Complexes in Block Copolymer Micelles: Effects of Pt(II) Сomplex and Micellar Core

AU - Жарская, Нина Александровна

AU - Дурова, Елизавета Вячеславовна

AU - Соломатина, Анастасия Игоревна

AU - Елистратова, Анастасия Алексеевна

AU - Власов, Петр Сергеевич

AU - Галенко, Екатерина Евгениевна

AU - Хлебников, Александр Феодосиевич

AU - Туник, Сергей Павлович

AU - Челушкин, Павел Сергеевич

PY - 2025/1/13

Y1 - 2025/1/13

N2 - The aggregation-induced phosphorescence emission (AIPE) phenomenon (emergence or increase in phosphorescence intensity as a result of aggregation of phosphorescent emitters) is regarded nowadays as an effective tool for improving brightness and tuning photophysical properties of phosphors. The intrinsic drawback of the aggregates featuring AIPE—their instability in aqueous dispersions, which hampers their utility in biomedical applications—can be overcome by their stabilization inside block copolymer micelles. Herein, we investigate the effects of both ligand and micellar core chemistries on the emergence of AIPE by using a series of the [Pt(C^N*N′^C′)] complexes embedded into three block copolymers with different micellar cores. It has been shown that the only micelles that supported AIPE revealed for the corresponding complexes in solid state are those with poly(ε-caprolactone) cores. The latter observation can be explained by the ability of poly(ε-caprolactone) to demonstrate non-negligible swelling in water, the content of which in the micellar core formed by this polymer seems to be high enough to induce the aggregation of the complexes and the concomitant AIPE effect.

AB - The aggregation-induced phosphorescence emission (AIPE) phenomenon (emergence or increase in phosphorescence intensity as a result of aggregation of phosphorescent emitters) is regarded nowadays as an effective tool for improving brightness and tuning photophysical properties of phosphors. The intrinsic drawback of the aggregates featuring AIPE—their instability in aqueous dispersions, which hampers their utility in biomedical applications—can be overcome by their stabilization inside block copolymer micelles. Herein, we investigate the effects of both ligand and micellar core chemistries on the emergence of AIPE by using a series of the [Pt(C^N*N′^C′)] complexes embedded into three block copolymers with different micellar cores. It has been shown that the only micelles that supported AIPE revealed for the corresponding complexes in solid state are those with poly(ε-caprolactone) cores. The latter observation can be explained by the ability of poly(ε-caprolactone) to demonstrate non-negligible swelling in water, the content of which in the micellar core formed by this polymer seems to be high enough to induce the aggregation of the complexes and the concomitant AIPE effect.

KW - Aggregation-induced phosphorescence

KW - блок-сополимеры

KW - полимерные мицеллы

KW - тетрадентантные комплексы Pt(II)

KW - Aggregation-induced phosphorescence

KW - Block copolymer micelle

KW - Lifetime

KW - Near-infrared luminescence

KW - Tetradentate Pt(II) complexes

UR - https://www.mendeley.com/catalogue/3db5984f-6cfa-3241-afc0-7a12330f5528/

U2 - 10.1002/slct.202405683

DO - 10.1002/slct.202405683

M3 - Article

VL - 10

JO - ChemistrySelect

JF - ChemistrySelect

SN - 2365-6549

IS - 2

M1 - e202405683

ER -