Vaporchromic Domino Transformation and Polarized Photonic Heterojunctions of Organoplatinum Microrods

• Published in: Angewandte Chemie 2024-11, Vol.136 (46), p.n/a
• Main Authors: Chen, Jian‐Cheng, Gong, Zhong‐Liang, Li, Zhong‐Qiu, Zhao, Yuan‐Yuan, Tang, Kun, Ma, Dian‐Xue, Xu, Fa‐Feng, Zhong, Yu‐Wu
• Format: Article
• Language: English
• Subjects: assembly; Control rods; Dichloromethane; Diffraction patterns; domino transformation; Emissions; Heterojunctions; Heterostructures; Information processing; organoplatinum complexes; Phosphorescence; Photonic crystals; photonic heterojunctions; Polarization; polarized luminescence; Solvents; X-ray diffraction
• ISSN: 0044-8249; 1521-3757
• DOI: 10.1002/ange.202412651

Photonic heterostructures with codable properties have shown great values as versatile information carriers at the micro‐ and nanoscale. These heterostructures are typically prepared by a step‐by‐step growth or post‐functionalization method to achieve varied emission colors with different building blocks. In order to realize high‐throughput and multivariate information loading, we report here a strategy to integrate polarization signals into photonic heterojunctions. A U‐shaped di‐Pt(II) complex has been assembled into highly polarized yellow‐phosphorescent crystalline microrods (Y‐rod) by strong intermolecular Pt⋅⋅⋅Pt interaction. Upon end‐initiated desorption of the incorporated CH2Cl2 solvents, the Y‐rod is transformed in a domino fashion into tri‐block polarized photonic heterojunctions (PPHs) with alternate red‐yellow‐red emissions or red‐phosphorescent microrods (R‐rods). The red emissions of these structures are also highly polarized; however, their polarization directions are just orthogonal to those of the yellow phosphorescence of the Y‐rod. With the aid of a patterned mask, the R‐rod can be further programmed into multi‐block PPHs with precisely controlled block sizes by side‐allowed adsorption of CH2Cl2 vapor. X‐ray diffraction analysis and theoretical calculations suggest that the solvent‐regulated modulation of the crystal packing and excited‐state property is critical for the construction of these PPHs. A U‐shaped di‐Pt(II) complex has been assembled into crystalline microrods by strong intermolecular Pt⋅⋅⋅Pt interaction. CH2Cl2‐vapor‐triggered domino transformation or patterned‐mask‐assisted vapor treatment transforms these microrods into multiblock polarized photonic heterojunctions with alternate yellow/red phosphorescence and orthogonal polarization directions, as a result of the vaporchromic switching of crystal packing and excited‐state properties.