• Shibahara, Hiroki
• Saeki, Akinori
• Mori, Yuki
• Akiyoshi, Ryohei
• Kawaguchi, Shogo
• Ogasawara, Kazuyoshi

Abstract

<jats:title>Abstract</jats:title><jats:p>Sulfur‐coordinated coordination polymers (S−CPs) have unique optoelectrical properties that originate from infinite M−S bond networks. In this study, we synthesized and characterized two polymorphs of a two–dimensional (2D) Pb(II) S−CP with a formula of [Pb(tzdt)(OAc)] (Htzdt=1,3‐thiazolidine‐2‐thione, OAc=acetate). Our findings revealed that the thermodynamic product (<jats:bold>KGF‐26</jats:bold>) possesses quasi‐2D (−Pb−S−)<jats:sub><jats:italic>n</jats:italic></jats:sub> layers with weak nonbonded Pb−S bonds, whereas the kinetic product (<jats:bold>KGF‐27</jats:bold>) has intrinsic 2D (−Pb−S−)<jats:sub><jats:italic>n</jats:italic></jats:sub> layers with Pb−S bonds. The results of time‐resolved microwave conductivity measurements and first–principles calculations confirmed that <jats:bold>KGF‐27</jats:bold> exhibits higher photoconductivity than <jats:bold>KGF‐26</jats:bold>, which establishes that the inorganic (−Pb−S−)<jats:sub><jats:italic>n</jats:italic></jats:sub> networks with Pb−S bonds are crucial for achieving high photoconductivity. This is the first experimental demonstration of the impact of the (−M−S−)<jats:sub><jats:italic>n</jats:italic></jats:sub> networks in S−CPs on photoconductivity through the comparison of crystal polymorphisms.</jats:p>

Topics

• impedance spectroscopy
• polymer
• photoconductivity