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Dowling K, Kruczyński T, Dutta S, Le DPN, Gozem S, McMillen CD, Bhuvanesh N, Stollenz M. Facile interconversion of mesitylcopper into a CuMes-Cu 2bis(amidinate) triangle and a tetracuprous Möbius strip. Chem Commun (Camb) 2024; 60:11136-11139. [PMID: 39279559 DOI: 10.1039/d4cc03935a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/18/2024]
Abstract
A new flexible bis(amidine) ligand featuring two additional N-donor groups incorporates a defined [CuIMesCu2I]2+ fragment from mesitylcopper into a triangular cluster with a reactive organometallic coordination site. Subtle changes to the reaction protocol result in the formation of an intertwined tetracuprous arrangement that adopts the shape of a Möbius strip.
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Affiliation(s)
- Keri Dowling
- Department of Chemistry and Biochemistry, Kennesaw State University, 370 Paulding Avenue, MD 1203, Kennesaw, Georgia 30144, USA.
| | - Tomasz Kruczyński
- Department of Chemistry and Biochemistry, Kennesaw State University, 370 Paulding Avenue, MD 1203, Kennesaw, Georgia 30144, USA.
| | - Sanjay Dutta
- Department of Chemistry and Biochemistry, Kennesaw State University, 370 Paulding Avenue, MD 1203, Kennesaw, Georgia 30144, USA.
| | - D P Ngan Le
- Department of Chemistry, Georgia State University, 145 Piedmont Ave SE, Atlanta, Georgia 30303, P. O. Box 3945, Atlanta, Georgia 30302-3945, USA
| | - Samer Gozem
- Department of Chemistry, Georgia State University, 145 Piedmont Ave SE, Atlanta, Georgia 30303, P. O. Box 3945, Atlanta, Georgia 30302-3945, USA
| | - Colin D McMillen
- Department of Chemistry, Clemson University, 379 Hunter Laboratories, Clemson, SC 29634-0973, USA
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, 580 Ross Street, P.O. Box 30012, College Station, Texas 77842-3012, USA
| | - Michael Stollenz
- Department of Chemistry and Biochemistry, Kennesaw State University, 370 Paulding Avenue, MD 1203, Kennesaw, Georgia 30144, USA.
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Arras J, Calderón-Díaz A, Lebedkin S, Gozem S, McMillen CD, Bhuvanesh N, Stollenz M. Twisted and Disconnected Chains: Flexible Linear Tetracuprous Arrays and a Decanuclear Cu I Cluster as Blue- and Green/Yellow-Light Emitters. Inorg Chem 2024; 63:12943-12957. [PMID: 38935842 PMCID: PMC11256752 DOI: 10.1021/acs.inorgchem.4c01646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/31/2024] [Accepted: 06/05/2024] [Indexed: 06/29/2024]
Abstract
Defined arrays of transition metal ions embedded in tailored polydentate ligand scaffolds allow for a systematic design of their physical properties. Such molecular strings of closed-shell transition metal centers are particularly interesting for Group 11 metal ions in the oxidation state +1 if they undergo metallophilic d10···d10 contact interactions since these clusters are oftentimes efficient photoluminescence (PL) emitters. Copper is particularly attractive as a sustainable earth-abundant coinage metal source and because of the ability of several CuI complexes to serve as powerful thermally activated delayed fluorescence (TADF) emitters in molecular/organic light-emitting devices (OLEDs). Our combined synthetic, crystallographic, photophysical, and computational study describes a straight tetracuprous array possessing a centrally disconnected CuI2···CuI2 chain and a continuous helically bent CuI4 complex. This molecular helix undergoes a facile rearrangement in diethyl ether solution, yielding an unprecedented nanosized CuI10 cluster (2.9 × 2.0 nm) upon crystallization. All three clusters show either bright blue phosphorescence, TADF, or green/yellow multiband phosphorescence with quantum yields between 6.5 and 67%, which is persistent under hydrostatic pressure up to 30 kbar. Temperature-dependent PL investigations in combination with time-dependent density-functional theory (TD-DFT) calculations and void space analyses of the crystal packings complement a comprehensive correlation between the molecular structures and photoluminescence properties.
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Affiliation(s)
- Janet Arras
- Department
of Chemistry and Biochemistry, Kennesaw
State University, 370 Paulding Avenue NW, MD # 1203, Kennesaw, Georgia 30144, United States
| | - Alvaro Calderón-Díaz
- Department
of Chemistry and Biochemistry, Kennesaw
State University, 370 Paulding Avenue NW, MD # 1203, Kennesaw, Georgia 30144, United States
| | - Sergei Lebedkin
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Samer Gozem
- Department
of Chemistry, Georgia State University, 145 Piedmont Ave SE, Atlanta, Georgia 30303, United States
| | - Colin D. McMillen
- Department
of Chemistry, Clemson University, 379 Hunter Laboratories, Clemson, South Carolina 29634-0973, United States
| | - Nattamai Bhuvanesh
- Department
of Chemistry, Texas A&M University, 580 Ross Street, P.O. Box 30012, College Station, Texas 77842-3012, United
States
| | - Michael Stollenz
- Department
of Chemistry and Biochemistry, Kennesaw
State University, 370 Paulding Avenue NW, MD # 1203, Kennesaw, Georgia 30144, United States
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Arras J, Ugarte Trejo O, Bhuvanesh N, McMillen C, Stollenz M. Hydrogen bonds and dispersion forces serving as molecular locks for tailored Group 11 bis(amidine) complexes. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00443g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A flexible polydentate bis(amidine) ligand LH2 operates as a molecular lock for various coinage metal fragments and forms the dinuclear complexes [LH2(MCl)2], M = Cu (1), Au (2), the coordination...
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