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Article

Effect of the Substitution of the Mesityl Group with Other Bulky Substituents on the Luminescence Performance of [Pt(1,3-bis(4-Mesityl-pyridin-2-yl)-4,6-difluoro-benzene)Cl]

by
Giulia De Soricellis
1,2,
Véronique Guerchais
3,
Alessia Colombo
1,*,
Claudia Dragonetti
1,
Francesco Fagnani
1,*,
Dominique Roberto
1 and
Daniele Marinotto
4
1
Dipartimento di Chimica, Università degli Studi di Milano, UdR INSTM di Milano, Via C. Golgi 19, I-20133 Milan, Italy
2
Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, I-27100 Pavia, Italy
3
Univ. Rennes 1, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
4
Istituto di Scienze e Tecnologie Chimiche (SCITEC) “Giulio Natta”, Consiglio Nazionale delle Ricerche (CNR), Via C. Golgi 19, I-20133 Milan, Italy
*
Authors to whom correspondence should be addressed.
Molecules 2025, 30(7), 1498; https://doi.org/10.3390/molecules30071498
Submission received: 28 February 2025 / Revised: 23 March 2025 / Accepted: 24 March 2025 / Published: 27 March 2025
(This article belongs to the Special Issue Feature Papers in Photochemistry and Photocatalysis—2nd Edition)
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Abstract

The synthesis and characterization of two new complexes, namely [Pt(bis(4-(4-(tert-butyl)phenyl)-pyridin-2-yl)-4,6-difluorobenzene)Cl] and [Pt(bis(4-(3,5-di-tert-butylphenyl)-pyridin-2-yl)-4,6-difluorobenzene)Cl], are reported. Both are highly luminescent in the blue region (Φlum = 0.89–0.95 at 478–480 nm), like the parent complex [Pt(1,3-bis(4-mesityl-pyridin-2-yl)-4,6-difluoro-benzene)Cl] in degassed diluted dichloromethane solution. An increase in concentration leads to the formation of bi-molecular emissive excited states, as evidenced by a growing structureless band that peaked at 690–697 nm. This formation is more facile for the complex with one tert-butyl group in para of the phenyl group. It appears that the introduction of two tert-butyls in positions 3 and 5 of the phenyl group hampers the neighboring of the monomeric species, although less efficiently than the introduction of methyls in positions 2 and 6.
Keywords: platinum(II) complexes; N^C^N ligand; luminescence platinum(II) complexes; N^C^N ligand; luminescence

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MDPI and ACS Style

De Soricellis, G.; Guerchais, V.; Colombo, A.; Dragonetti, C.; Fagnani, F.; Roberto, D.; Marinotto, D. Effect of the Substitution of the Mesityl Group with Other Bulky Substituents on the Luminescence Performance of [Pt(1,3-bis(4-Mesityl-pyridin-2-yl)-4,6-difluoro-benzene)Cl]. Molecules 2025, 30, 1498. https://doi.org/10.3390/molecules30071498

AMA Style

De Soricellis G, Guerchais V, Colombo A, Dragonetti C, Fagnani F, Roberto D, Marinotto D. Effect of the Substitution of the Mesityl Group with Other Bulky Substituents on the Luminescence Performance of [Pt(1,3-bis(4-Mesityl-pyridin-2-yl)-4,6-difluoro-benzene)Cl]. Molecules. 2025; 30(7):1498. https://doi.org/10.3390/molecules30071498

Chicago/Turabian Style

De Soricellis, Giulia, Véronique Guerchais, Alessia Colombo, Claudia Dragonetti, Francesco Fagnani, Dominique Roberto, and Daniele Marinotto. 2025. "Effect of the Substitution of the Mesityl Group with Other Bulky Substituents on the Luminescence Performance of [Pt(1,3-bis(4-Mesityl-pyridin-2-yl)-4,6-difluoro-benzene)Cl]" Molecules 30, no. 7: 1498. https://doi.org/10.3390/molecules30071498

APA Style

De Soricellis, G., Guerchais, V., Colombo, A., Dragonetti, C., Fagnani, F., Roberto, D., & Marinotto, D. (2025). Effect of the Substitution of the Mesityl Group with Other Bulky Substituents on the Luminescence Performance of [Pt(1,3-bis(4-Mesityl-pyridin-2-yl)-4,6-difluoro-benzene)Cl]. Molecules, 30(7), 1498. https://doi.org/10.3390/molecules30071498

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