Phase Engineering of Cs–Pb–Br Nanoparticles for Tunable Optical Behavior

Son A. G.; Gushina V. A.; Teplyakov E. A.; Yarzhemsky V. G.; X. Jiang; A. S. Vasenko; Stippell E.; Prezhdo O. V.; Arzhanova A. A.; Korotkova N. A.; Cherednichenko K. A.; Vishnevich A. S.; S. A. Kozyukhin

doi:10.1039/d6cp00671j

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Phase Engineering of Cs–Pb–Br Nanoparticles for Tunable Optical Behavior

Physical Chemistry Chemical Physics. 2026. Vol. 28. No. 33. P. 20162–20176.

Son A. G., Gushina V. A., Teplyakov E. A., Yarzhemsky V. G., X. Jiang, A. S. Vasenko, Stippell E., Prezhdo O. V., Arzhanova A. A., Korotkova N. A., Cherednichenko K. A., Vishnevich A. S., S. A. Kozyukhin

We report tunable structural and optical properties of Cs‑Pb‑Br nanomaterials, including the classic CsPbBr3 perovskite, and perovskite-inspired CsPb2Br5 and Cs4PbBr6 compounds. By systematically varying precursor composition, reaction conditions, and external stimuli, such as moisture and solvents, we achieve controlled formation and reversible phase transitions among these structures. Optical spectroscopy, combined with density functional theory, reveals that the degree of octahedral connectivity governs both absorption and emission behavior: CsPbBr3 exhibits bright green photoluminescence due to parity-allowed direct transitions, CsPb2Br5 shows weak orange-red emission associated with indirect or symmetry-forbidden transitions, while Cs4PbBr6 remains non-emissive due to isolated [PbBr6]4− octahedra and parity‑forbidden electronic states. We demonstrate how external stimuli can induce structural reorganization into the emissive CsPbBr3 phase, enabling dynamic modulation of luminescence. The reported findings highlight the tunability of structural phases and emission properties in perovskite-inspired systems, offering new opportunities for switchable optoelectronic devices and stimuli-responsive luminescent materials.

Research target: Chemistry

Language: English

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DOI

Keywords: Photoluminescence Фотолюминесценция Теория функционала плотности Наночастицы перовскиты Perovskites Density functional theory (DFT)Nanoparticles

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Yurova P., Stenina I., Yaroslavtsev A. B., Membranes and Membrane Technologies 2026 Vol. 8 No. 1 P. 1–8

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sobov P., Yakushev I., Shestakov A. et al., Organometallics 2025 Vol. 44 No. 24 P. 2873–2881

Interaction of {Cryptand(K+)}(C60•–) with CpCo(CO)2 yields the air-sensitive crystalline salt {Cryptand(K+)}{CpCo(CO)-η2-C60•–} (1), in which C60•– replaces carbonyl group in CpCo(CO)2. Two Co–C bonds of 2.028(9) and 2.057(8)Å are formed. The magnetic moment of 1 is 1.72 μB, indicating a doublet S = 1/2 spin state of {CpCo(CO)-η2-C60•–} at 300 K. The compound shows a broad ...

Added: September 20, 2026

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Novikov A., Polyhedron 2026 Vol. 299 Article 118383

Three new Hg(II) bromide complexes, HgBr2L (1–3) (L1 = N′-(pyridin-2-ylmethylene)isonicotinohydrazide, L2 = N′-(1-(pyridin-2-yl)ethylidene)isonicotinohydrazide, L3 = N′-(phenyl(pyridin-2-yl)methylene)isonicotinohydrazide), have been synthesized in good yields and thoroughly characterized. Single-crystal X-ray diffraction analyses unveil that complexes 1 and 3 are mononuclear, while complex 2 is dinuclear. All complexes further assemble into one-dimensional supramolecular chains mediated by N–H···N hydrogen bonds, which are reinforced by π···π stacking and Br···Br halogen interactions. Systematic variation ...

Added: September 16, 2026

Water confined in heterogeneous clay–quartz pores: Structure and dynamics from atomistic simulations

Glushak A., Tararushkin E., Smirnov G., Colloids and Surfaces A: Physicochemical and Engineering Aspects 2027 Vol. 752 Article 141756

The molecular-scale behavior of water in heterogeneous clay–quartz systems is critical for understanding cementation processes in natural soils and compacted bentonite, which is crucial for oil recovery and nuclear waste disposal barriers construction. Here we investigate how heterogeneity of mixed Na-montmorillonite and α-quartz surfaces affect water structure and dynamics in nanopores of 2.5 to 60 Å ...

Added: September 15, 2026

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Kolin N., Nazarov D., Krivenko K. et al., Dyes and Pigments 2026 Vol. 254 Article 113957

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Added: September 14, 2026

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Faraonov M., Romanenko N., Ivanov T. et al., Dalton Transactions 2026 Vol. 55 No. 24 P. 9428–9438

Doubly reduced phthalocyanine complexes remain largely unexplored despite their potential relevance for molecular spin-based applications. Herein, we report the synthesis of a series of crystalline complexes, {cryptand(Cs + )} 2 [M(Pc) 4– ] 2–. ...

Added: September 14, 2026

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Mikhailenko M., Astakhova T., Timokhina E. N. et al., Inorganic Chemistry Frontiers 2026 Vol. 13 No. 14 P. 6145–6156

series of anionic bi- and trinuclear complexes of Co II , Fe II , and Mn II with hexaazatrinaphthylene (HATNA) and hexaazatriphenylenehexacarbonitrile (HAT(CN) 6 ), incorporating paramagnetic Cp* 2 Fe + cations ( S = 1/2), were obtained and investigated. ...

Added: September 14, 2026

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Nazarov D., Yakushev I. A., Aleksey V. Kuzmin et al., Inorganic Chemistry Frontiers 2026 Vol. 13 No. 11 P. 5039–5050

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Added: September 14, 2026

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Sobov P. A., Khasanov S., Kuzmin A. V. et al., Inorganic Chemistry Communications 2026 Vol. 185 Article 116055

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Sobov P. A., Kuzmin A. V., Shevchun A. F. et al., Synthetic Metals 2025 Vol. 313 Article 117904

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Added: September 14, 2026

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Flakina A. M., Nazarov D., Faraonov M. et al., Crystal Growth & Design 2025 Vol. 25 No. 15 P. 6332–6344

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Added: September 14, 2026

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Osipov N., Faraonov M., Yakushev I. A. et al., Dalton Transactions 2025 Vol. 54 No. 32 P. 12180–12188

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Added: September 14, 2026

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Krivenko K., Shestakov A., Faraonov M. et al., European Journal of Inorganic Chemistry 2025 Vol. 28 No. 14 Article e202400760

Truxenone (Tr) with high C3h symmetry forms crystalline radical anion and dianion salts. The {Bu3MeP+}(Tr⋅−) (1) and {Cp*2Co+)}(Tr⋅−)⋅2 C6H4Cl2 (2) show intense low‐energy absorption up to 2000 nm. Calculations predict Jahn–Teller distortions for Tr⋅−, which are enhanced by the asymmetric approach of cations to Tr⋅−, leading to C=O bond length alternation and EPR signal asymmetry in 2. ...

Added: September 14, 2026

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Liang Y., Zhang X., Wang Q. et al., ACS Applied Nano Materials 2026 Vol. 9 No. 32 P. 15224–15232

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Added: August 27, 2026

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Pushkarev A., Khmelevskaia D., Matchenya I. et al., Nature 2026 Vol. 656 P. 80–85

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Added: August 27, 2026