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ARS Home » Plains Area » Manhattan, Kansas » Center for Grain and Animal Health Research » Grain Quality and Structure Research » Research » Publications at this Location » Publication #381419
Research Project: Measurement and Improvement of Hard Winter Wheat End-Use Quality Traits

Location: Grain Quality and Structure Research

Title: Porosity induced rigidochromism in platinum(II) terpyridyl luminophores @ silica composites

Author
item Norton, Amie
item ZANONI, KASSIO - Universidade De Sao Paulo
item DOURGES, MARIE-ANNE - University Of Bordeaux
item RAVARO, LEANDRO - Universidade De Sao Paulo
item ABDOLMALEKI, MAHMOOD - University Of Cincinnati
item DE CAMARGO, ANDREA - Universidade De Sao Paulo
item TOUPANCE, THIERRY - University Of Bordeaux
item CONNICK, WILLIAM - University Of Cincinnati
item CHATTERJEE, SAYANDEV - Essence Diagnostics Llc

Submitted to: Journal of Materials Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/15/2021
Publication Date: 4/16/2021
Citation: Norton, A.E., Zanoni, K.P., Dourges, M., Ravaro, L.P., Abdolmaleki, M.K., De Camargo, A.S., Toupance, T., Connick, W., Chatterjee, S. 2021. Porosity induced rigidochromism in platinum(II) terpyridyl luminophores @ silica composites. Journal of Materials Chemistry. 19/6193-6207. https://doi.org/10.1039/D1TC00599E.
DOI: https://doi.org/10.1039/D1TC00599E

Interpretive Summary: Hybrid materials, bring together two materials typically a substrate and a platform to enhance the function of substrate. This work presents a new class of stimuli responsive multi-functional materials based on platinum(II) terpyridyl @ silica composites. Presented here is the impact of pore size on the spectroscopy of Pt(II) complex. Silica materials with varying pore sizes (2-50 nm, <2 nm) were examine and loaded with the Pt(II) complex. The properties of Pt(II) complexes are govern by the Pt...Pt interactions. This work explores how varying the pore size of the silica support influences the properties of Pt(II). The properties of the Pt(II) salt show a systematic dependence on the mean pore size of the silica support.

Technical Abstract: Stimuli responsive composites consisting of inorganic or organometallic coordination substrates supported on porous platforms that integrate and improve the key features of both the substrate and platform, open the doorway to advanced multi-functional materials. This work presents a new class of stimuli responsive multi-functional materials based on platinum(II) terpyridyl luminophores @ silica composites. Presented herein is the impact of intercalation of Pt(II) salts with a planar architecture and sterically permitting terpyridyl ligands within meso or microporous silica support, on their spectroscopies. The photophysics and luminescence properties of square-planar Pt(II) salts are governed by their intermolecular, non-covalent Pt•••Pt interactions between the individual Pt(II) units; a feature that has been explored in designing stimuli responsive materials. This work explores a novel methodology where the electronic structure and luminescence behavior of such salts are systematically varied through their intercalation within rigid silica frameworks. The intercalation of Pt(II) complexes with varied degrees of non-covalent Pt•••Pt interactions in the virgin form within meso- and microporous silica supports generates materials that show marked variation in their electronic structure and luminescence behavior compared to their virgin salts. Further, the spectroscopies show a systematic dependence on the mean pore size of the silica support. The X-ray powder diffraction and microscopy studies reveal these behaviors to be related to the perturbations in their long-range structural order, that gets reflected in their microcrystalline dimensions and particle morphologies.