Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence

Maya Chaaban; Azza Ben-Akacha; Michael Worku; Sujin Lee; Jennifer Neu; Xinsong Lin; J. S.Raaj Vellore Winfred; Cordell J. Delzer; Jason P. Hayward; Mao Hua Du; Theo Siegrist; Biwu Ma

doi:10.1021/acs.jpclett.1c02354

Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence

Maya Chaaban, Azza Ben-Akacha, Michael Worku, Sujin Lee, Jennifer Neu, Xinsong Lin, J. S.Raaj Vellore Winfred, Cordell J. Delzer, Jason P. Hayward, Mao Hua Du, Theo Siegrist, Biwu Ma

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Ionically bonded organic metal halide hybrids have emerged as versatile multicomponent material systems exhibiting unique and useful properties. The unlimited combinations of organic cations and metal halides lead to the tremendous structural diversity of this class of materials, which could unlock many undiscovered properties of both organic cations and metal halides. Here we report the synthesis and characterization of a series benzoquinolinium (BZQ) metal halides with a general formula (BZQ)Pb2X5 (X = Cl, Br), in which metal halides form a unique two-dimensional (2D) structure. These BZQ metal halides are found to exhibit enhanced photoluminescence and stability as compared to the pristine BZQ halides, due to the scaffolding effects of 2D metal halides. Optical characterizations and theoretical calculations reveal that BZQ+ cations are responsible for the emissions in these hybrid materials. Changing the halide from Cl to Br introduces heavy atom effects, resulting in yellow room temperature phosphorescence (RTP) from BZQ+ cations.

Original language	English
Pages (from-to)	8229-8236
Number of pages	8
Journal	Journal of Physical Chemistry Letters
Volume	12
Issue number	34
DOIs	https://doi.org/10.1021/acs.jpclett.1c02354
State	Published - Sep 2 2021
Externally published	Yes

Funding

This work was supported by the Air Force Office of Scientific Research under Contract No. FA9550-18-1-0231 and the Florida State University Office of Research. This work made use of the Rigaku Synergy-S single-crystal X-ray diffractometer acquired through the NSF MRI program (Award CHE-1828362) and the Edinburgh Instruments LP980-KS transient absorption system acquired through the NSF MRI program (Grant No. CHE-1531629). A portion of the work was conducted in the FSU Department of Chemistry & Biochemistry’s MAC (FSU075000MAC) and X-ray (FSU075000XRAY) Laboratories. The theoretical calculations are based upon work supported by the Department of Energy Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division (M.-H.D.), and National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA0003180 (C.J.D. and J.P.H.). This work was supported by the Air Force Office of Scientific Research under Contract No. FA9550-18-1-0231 and the Florida State University Office of Research. This work made use of the Rigaku Synergy-S single-crystal X-ray diffractometer acquired through the NSF MRI program (Award CHE-1828362) and the Edinburgh Instruments LP980-KS transient absorption system acquired through the NSF MRI program (Grant No. CHE-1531629). A portion of the work was conducted in the FSU Department of Chemistry & Biochemistry's MAC (FSU075000MAC) and X-ray (FSU075000XRAY) Laboratories. The theoretical calculations are based upon work supported by the Department of Energy Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division (M.-H.D.), and National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA0003180 (C.J.D. and J.P.H.).

Funders	Funder number
Florida State University Office of Research
National Science Foundation	CHE-1828362, FSU075000XRAY, FSU075000MAC, CHE-1531629
U.S. Department of Energy
Air Force Office of Scientific Research	FA9550-18-1-0231
Basic Energy Sciences
National Nuclear Security Administration	DE-NA0003180
Division of Materials Sciences and Engineering

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Chaaban, M., Ben-Akacha, A., Worku, M., Lee, S., Neu, J., Lin, X., Vellore Winfred, J. S. R., Delzer, C. J., Hayward, J. P., Du, M. H., Siegrist, T., & Ma, B. (2021). Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence. Journal of Physical Chemistry Letters, 12(34), 8229-8236. https://doi.org/10.1021/acs.jpclett.1c02354

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title = "Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence",

abstract = "Ionically bonded organic metal halide hybrids have emerged as versatile multicomponent material systems exhibiting unique and useful properties. The unlimited combinations of organic cations and metal halides lead to the tremendous structural diversity of this class of materials, which could unlock many undiscovered properties of both organic cations and metal halides. Here we report the synthesis and characterization of a series benzoquinolinium (BZQ) metal halides with a general formula (BZQ)Pb2X5 (X = Cl, Br), in which metal halides form a unique two-dimensional (2D) structure. These BZQ metal halides are found to exhibit enhanced photoluminescence and stability as compared to the pristine BZQ halides, due to the scaffolding effects of 2D metal halides. Optical characterizations and theoretical calculations reveal that BZQ+ cations are responsible for the emissions in these hybrid materials. Changing the halide from Cl to Br introduces heavy atom effects, resulting in yellow room temperature phosphorescence (RTP) from BZQ+ cations.",

author = "Maya Chaaban and Azza Ben-Akacha and Michael Worku and Sujin Lee and Jennifer Neu and Xinsong Lin and {Vellore Winfred}, {J. S.Raaj} and Delzer, {Cordell J.} and Hayward, {Jason P.} and Du, {Mao Hua} and Theo Siegrist and Biwu Ma",

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Chaaban, M, Ben-Akacha, A, Worku, M, Lee, S, Neu, J, Lin, X, Vellore Winfred, JSR, Delzer, CJ, Hayward, JP, Du, MH, Siegrist, T & Ma, B 2021, 'Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence', Journal of Physical Chemistry Letters, vol. 12, no. 34, pp. 8229-8236. https://doi.org/10.1021/acs.jpclett.1c02354

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T1 - Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence

AU - Chaaban, Maya

AU - Ben-Akacha, Azza

AU - Worku, Michael

AU - Lee, Sujin

AU - Neu, Jennifer

AU - Lin, Xinsong

AU - Vellore Winfred, J. S.Raaj

AU - Delzer, Cordell J.

AU - Hayward, Jason P.

AU - Du, Mao Hua

AU - Siegrist, Theo

AU - Ma, Biwu

PY - 2021/9/2

Y1 - 2021/9/2

N2 - Ionically bonded organic metal halide hybrids have emerged as versatile multicomponent material systems exhibiting unique and useful properties. The unlimited combinations of organic cations and metal halides lead to the tremendous structural diversity of this class of materials, which could unlock many undiscovered properties of both organic cations and metal halides. Here we report the synthesis and characterization of a series benzoquinolinium (BZQ) metal halides with a general formula (BZQ)Pb2X5 (X = Cl, Br), in which metal halides form a unique two-dimensional (2D) structure. These BZQ metal halides are found to exhibit enhanced photoluminescence and stability as compared to the pristine BZQ halides, due to the scaffolding effects of 2D metal halides. Optical characterizations and theoretical calculations reveal that BZQ+ cations are responsible for the emissions in these hybrid materials. Changing the halide from Cl to Br introduces heavy atom effects, resulting in yellow room temperature phosphorescence (RTP) from BZQ+ cations.

AB - Ionically bonded organic metal halide hybrids have emerged as versatile multicomponent material systems exhibiting unique and useful properties. The unlimited combinations of organic cations and metal halides lead to the tremendous structural diversity of this class of materials, which could unlock many undiscovered properties of both organic cations and metal halides. Here we report the synthesis and characterization of a series benzoquinolinium (BZQ) metal halides with a general formula (BZQ)Pb2X5 (X = Cl, Br), in which metal halides form a unique two-dimensional (2D) structure. These BZQ metal halides are found to exhibit enhanced photoluminescence and stability as compared to the pristine BZQ halides, due to the scaffolding effects of 2D metal halides. Optical characterizations and theoretical calculations reveal that BZQ+ cations are responsible for the emissions in these hybrid materials. Changing the halide from Cl to Br introduces heavy atom effects, resulting in yellow room temperature phosphorescence (RTP) from BZQ+ cations.

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Metal Halide Scaffolded Assemblies of Organic Molecules with Enhanced Emission and Room Temperature Phosphorescence

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