Enhanced Circularly Polarized Luminescence by a Homochiral Guest-Host Interaction in Gyroidal MOFs, [Ru(bpy)3] [M2(ox)3] (bpy = 2,2'-Bipyridyl, ox = Oxalate, M = Zn, Mn)

Kazuya Nakashima; Rie Suizu; Shuhei Morishita; Noriaki Tsurumachi; Masahiro Funahashi; Hyuma Masu; Ryuki Ozawa; Kazuki Nakamura; Kunio Awaga

doi:10.1021/acsmaterialsau.2c00081

Enhanced Circularly Polarized Luminescence by a Homochiral Guest-Host Interaction in Gyroidal MOFs, [Ru(bpy)₃] [M₂(ox)₃] (bpy = 2,2'-Bipyridyl, ox = Oxalate, M = Zn, Mn)

ACS Mater Au. 2023 Mar 17;3(3):201-205. doi: 10.1021/acsmaterialsau.2c00081. eCollection 2023 May 10.

Authors

Kazuya Nakashima¹, Rie Suizu^{1

2}, Shuhei Morishita³, Noriaki Tsurumachi³, Masahiro Funahashi³, Hyuma Masu^{4

5}, Ryuki Ozawa^{6

7}, Kazuki Nakamura⁶, Kunio Awaga¹

Affiliations

¹ Department of Chemistry and IRCCS, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan.
² PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
³ Program in Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan.
⁴ Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
⁵ Center for Analytical Instrumentation, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
⁶ Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
⁷ Research Fellowship of Japan Society for the Promotion of Science for Young Scientists, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan.

Abstract

We report the circularly polarized luminescence (CPL) for [Ru(bpy)₃]I₂ (1) and [Ru(bpy)₃][M₂(ox)₃] (M = Zn (2), Mn (3)). Whereas compound 1 is a simple salt of [Ru(bpy)₃]²⁺, 2 and 3 are MOFs in which the chiral [Ru(bpy)₃]²⁺ ions are encapsulated in a homochiral gyroidal skeleton of [M₂(ox)₃]^2-. Whereas the solution of 1 exhibited weak CPL with a luminescence dissymmetry factor of |g_lum| ∼ 10^-4, the CPL was significantly enhanced in solid-state 1-3 with |g_lum| = 2 × 10^-2 for 1, 4 × 10^-2 for 2, and 1 × 10^-1 for 3. The enhanced CPL in 3 was attributable to an energy transfer between the homochiral guest and host in 3.