Ultrafast high spin-low spin photo-switching of an isolated [FeL2][BF4]2 spin-crossover complex at room temperature

被引：0

作者：

Bede, Damla ^{[1
]}

Gurpinar, Kuebra

Karakaya, E. Uzay ^{[3
]}

Akca, Fatime Gulsah ^{[3
]}

Nazir, Hasan ^{[2
]}

Emre, Barid ^{[1
]}

Atakol, Orhan ^{[2
]}

Duman, Eyuep ^{[1
,3
]}

Yaglioglu, Halime Gul ^{[1
,3
]}

机构：

[1] Ankara Univ, Dept Engn Phys, Degol St, TR-06560 Besevler, Ankara, Turkiye

[2] Ankara Univ, Dept Chem, Degol St, TR-06100 Besevler, Ankara, Turkiye

[3] Turkish Accelerator & Radiat Lab TARLA, Bahcelievler Mah 306 sk 11-N, TR-06830 Golbasi, Ankara, Turkiye

来源：

OPTICAL MATERIALS | 2025年 / 159卷

关键词：

spin crossover; Reverse LIESST; Ultrafast spectroscopy; Ligand field states; Photo switching; DYNAMICS;

D O I：

10.1016/j.optmat.2024.116588

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of ligand field (LF) states in photo-physics of reverse light-induced excited spin state trapping (reverseLIESST) effect of an Iron (II) spin-crossover (SCO) complex was demonstrated experimentally in solution, at room temperature by using ultrafast transient absorption spectroscopy technique. We showed that selective photo switching between high spin (HS) and low-spin (LS) states, i.e. HS-HS or HS-LS transitions, is possible by photo excitation from HS ground state to the HS* metal-ligand charge transfer (MLCT) states (at 400 nm pumping) or to ligand-field (LF) state (at 435 nm pumping), respectively. This is an effective direct observation of reverse-LIESST effect through LF state pumping in solution at room temperature. We have proposed different relaxation pathways along with the ultrafast relaxation time components that account for HS-HS and HS-LS transitions.

引用

页数：6

共 25 条

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