Dibenzoquinone Cyclopentadithiophene Diradicaloids Show Optical Transitions of Different Spin States and Anomalous Near‐Infrared Emission

Abstract: We have prepared a series of bis (semiquinone) compounds with dithiophene bridges of different length that evolve from closed‐shell (smaller compound) to full diradical (longer compound) for which the narrow singlet‐triplet energy gap allows the triplet population at 298 K. The medium size system has a variety of photonic properties with absorptions and emission in the optical near‐infrared region mediated by a unique case of anti‐Kasha emission. A whole set of optical absorption/emission and vibrational steady state spectroscopies as well as picosecond transient absorption spectroscopy, all complemented with spectroelectrochemistry and theoretical calculations, is presented.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Dibenzoquinone Cyclopentadithiophene Diradicaloids Show Optical Transitions of Different Spin States and Anomalous Near‐Infrared Emission ; day:29 ; month:10 ; year:2024 ; extent:7 ; Angewandte Chemie / International edition. International edition ; (29.10.2024) (gesamt 7)

Contributors, Places and Time

• Creator: Privado, María ; Moles Quintero, Sergio ; Barrejón, Myriam ; de La Cruz, Pilar ; P. M., Janaarthana Babu ; Casanova, David ; Langa, Fernando ; Casado, Juan

Further information

• DOI: 10.1002/anie.202413988
• URN: urn:nbn:de:101:1-2410291347341.068978883260
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:29 AM CEST