Journal Article

PUBDB-2025-01890

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fluorescence of Helical Molecular Springs Under High Pressure

Liang, J.Extern* ; Ju, C.-W. ; Liu, Z. ; Li, H.Extern* ; Karina, A.Extern* ; Eklund, T.Extern*XFEL.EU* ; Zheng, W. ; Amann-Winkel, K.Extern* ; Cai, W.Extern* ; Wagner, M. ; Qiu, Z. (Corresponding author) ; Weil, T. (Corresponding author) ; Müllen, K. (Corresponding author)

2025
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/anie.202500923  doi:10.3204/PUBDB-2025-01890

Abstract: Although the unique structure of helicenes resembles molecular springs, the effects of their extension–contraction cycles on their properties have rarely been explored. Here, we investigated the fluorescence of two π-extended [n]helicenes with different helical lengths n, named [7] and [9], under high pressures in a diamond anvil cell. The experimental results showed that compound [9], with a longer helical length, exhibited a more sensitive fluorescence response than [7] in both crystalline and solvated states upon compression. Theoretical calculations reveal that π–π overlapping at their helices in these molecular springs provides an additional contribution to their fluorescence properties under compression when the overlap becomes sufficiently strong. Our results provide insights into structure–property relationships of helical molecules under high-pressure conditions and verify the potential of helicenes as molecular springs for future applications in molecular machines.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20220099 (I-20220099) (I-20220099)

Experiment(s):

1. PETRA Beamline P02.2 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; Index Chemicus ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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