TY - JOUR
T1 - Effect of electron-donating groups on the excited state spectroscopy and dynamics of 2′-hydroxychalcone derivatives
AU - Abdel-Jalil, Raid J.
AU - Ibrahim, A. Ramadan
AU - Abou-Zied, Osama K.
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/2/1
Y1 - 2023/2/1
N2 - We investigated the effect of different electron-donating groups on the intramolecular charge transfer (ICT) process in three hydroxychalcone derivatives. More efficient ICT was observed when replacing N(Me)2 by pyrrolidine due to less hydrogen bonding with solvent. Adding NH2 to the structure caused more planarity that was detected as a larger fluorescence quantum yield and narrower fluorescence peak. This was confirmed by femtosecond transient absorption in which the intramolecular twisting process, observed in the other derivatives, was absent in the presence of NH2. This work should be a useful step toward understanding and tailoring the excited state spectroscopy of chalcone derivatives.
AB - We investigated the effect of different electron-donating groups on the intramolecular charge transfer (ICT) process in three hydroxychalcone derivatives. More efficient ICT was observed when replacing N(Me)2 by pyrrolidine due to less hydrogen bonding with solvent. Adding NH2 to the structure caused more planarity that was detected as a larger fluorescence quantum yield and narrower fluorescence peak. This was confirmed by femtosecond transient absorption in which the intramolecular twisting process, observed in the other derivatives, was absent in the presence of NH2. This work should be a useful step toward understanding and tailoring the excited state spectroscopy of chalcone derivatives.
KW - Chalcones
KW - Intramolecular charge transfer
KW - Steady-state spectroscopy
KW - Ultrafast dynamics
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UR - https://www.mendeley.com/catalogue/3ce008bd-37a1-39f0-83a3-39dd7e3481d6/
U2 - 10.1016/j.cplett.2023.140299
DO - 10.1016/j.cplett.2023.140299
M3 - Article
AN - SCOPUS:85146008359
SN - 0009-2614
VL - 813
JO - Chemical Physics Letters
JF - Chemical Physics Letters
M1 - 140299
ER -