A phase transformable ultrastable titanium-carboxylate framework for photoconduction

Sujing Wang, Takashi Kitao, Nathalie Guillou, Mohammad Wahiduzzaman, Charlotte Martineau-Corcos, Farid Nouar, Antoine Tissot, Laurent Binet, Naseem Ramsahye, Sabine Devautour-Vinot, Susumu Kitagawa, Shu Seki, Yusuke Tsutsui, Valérie Briois, Nathalie Steunou, Guillaume Maurin, Takashi Uemura () and Christian Serre ()
Additional contact information
Sujing Wang: PSL Research University
Takashi Kitao: Kyoto University
Nathalie Guillou: Université Paris-Saclay
Mohammad Wahiduzzaman: Université Montpellier
Charlotte Martineau-Corcos: Université Paris-Saclay
Farid Nouar: PSL Research University
Antoine Tissot: PSL Research University
Laurent Binet: Chimie ParisTech
Naseem Ramsahye: Université Montpellier
Sabine Devautour-Vinot: Université Montpellier
Susumu Kitagawa: Kyoto University
Shu Seki: Kyoto University
Yusuke Tsutsui: Kyoto University
Valérie Briois: Synchrotron SOLEIL-UR1
Nathalie Steunou: Université Paris-Saclay
Guillaume Maurin: Université Montpellier
Takashi Uemura: Kyoto University
Christian Serre: PSL Research University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Porous titanium oxide materials are attractive for energy-related applications. However, many suffer from poor stability and crystallinity. Here we present a robust nanoporous metal–organic framework (MOF), comprising a Ti12O15 oxocluster and a tetracarboxylate ligand, achieved through a scalable synthesis. This material undergoes an unusual irreversible thermally induced phase transformation that generates a highly crystalline porous product with an infinite inorganic moiety of a very high condensation degree. Preliminary photophysical experiments indicate that the product after phase transformation exhibits photoconductive behavior, highlighting the impact of inorganic unit dimensionality on the alteration of physical properties. Introduction of a conductive polymer into its pores leads to a significant increase of the charge separation lifetime under irradiation. Additionally, the inorganic unit of this Ti-MOF can be easily modified via doping with other metal elements. The combined advantages of this compound make it a promising functional scaffold for practical applications.

Date: 2018
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DOI: 10.1038/s41467-018-04034-w

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