Photoinduced excimer generation in perylene diimide dimer: effects of solvent polarity [Invited]

Guangliu Ran; Hang Wang; Yujing Song; Yahui Liu; Zhishan Bo; Wenkai Zhang

doi:10.3788/COL202220.100009

Journals >Chinese Optics Letters >Volume 20 >Issue 10 >Page 100009 > Article

Chinese Optics Letters
Vol. 20, Issue 10, 100009 (2022)

Photoinduced excimer generation in perylene diimide dimer: effects of solvent polarity [Invited]

Guangliu Ran¹, Hang Wang², Yujing Song¹, Yahui Liu², Zhishan Bo^2、3, and Wenkai Zhang^1、*

Author Affiliations

¹Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, , Beijing 100875, China

²College of Textiles & Clothing, , Qingdao 266071, China

³Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, , Beijing 100875, China

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DOI: 10.3788/COL202220.100009 Cite this Article Set citation alerts

Guangliu Ran, Hang Wang, Yujing Song, Yahui Liu, Zhishan Bo, Wenkai Zhang. Photoinduced excimer generation in perylene diimide dimer: effects of solvent polarity [Invited][J]. Chinese Optics Letters, 2022, 20(10): 100009 Copy Citation Text

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(a) Molecular structure of PDI-C5; (b) molecular structure of PDI-II; (c) normalized absorption and fluorescence spectra of PDI-C5 in solvents; (d) normalized absorption and fluorescence spectra of PDI- II in solvents.

Fig. 1. (a) Molecular structure of PDI-C5; (b) molecular structure of PDI-II; (c) normalized absorption and fluorescence spectra of PDI-C5 in solvents; (d) normalized absorption and fluorescence spectra of PDI- II in solvents.

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TA spectra at selected delay time of PDI-C5 in (a), (d) DCM, (b), (e) THF, and (c), (f) acetone. (a)–(c) show short time decay range. (d)–(f) show long time decay range. Excited at 480 nm.

Fig. 2. TA spectra at selected delay time of PDI-C5 in (a), (d) DCM, (b), (e) THF, and (c), (f) acetone. (a)–(c) show short time decay range. (d)–(f) show long time decay range. Excited at 480 nm.

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Fig. 3. TA spectra at selected delay time of PDI-II in (a), (d) DCM, (b), (e) THF, and (c), (f) acetone. (a)–(c) show short time decay range. (d)–(f) show long time decay range. Excited at 480 nm.

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Fig. 4. Global target analysis results derived from Fs-TA of PDI-C5. SADSs and population of PDI-C5 in (a), (d) DCM, (b), (e) THF, and (c), (f) acetone (LE is locally excited, CT is charge transfer, and GS is ground state).

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Fig. 5. Global target analysis results derived from Fs-TA of PDI-II. SADSs and population of PDI-II in (a), (d) DCM, (b), (e) THF, and (c), (f) acetone (Ex. is excimer; Re. Ex. is relaxed excimer).

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Fig. 6. Jablonski diagram illustrating the kinetic model used to fit TA from PDI-C5 and PDI-II solutions.

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Molecule	Solution	Polarity	$Φ$	$τ$ (ns)
PDI-C5	DCM	3.4	$> 0.95$	4.29
	THF	4.2	$> 0.95$	4.17
	Acetone	5.4	$> 0.95$	4.31
PDI- II	DCM	3.4	0.61	5.43
	THF	4.2	0.27	5.24
	Acetone	5.4	0.04	5.79

Table 1. Fluorescence Quantum Yields and Corresponding Fluorescence Lifetime of PDI-C5 and PDI-II in Different Solvents

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Molecular	Solution	τ₁ (ps)	τ₂ (ps)	τ₃ (ps)	τ₄ (ps)
PDI-C5	DCM	$129 \pm 1$	$2957 \pm 11$	–	–
	THF	$139 \pm 1$	$3417 \pm 14$	–	–
	Acetone	$113 \pm 6$	$3335 \pm 31$	–	–
PDI-II	DCM	$92 \pm 17$	$4402 \pm 54$	–
	THF	$7.69 \pm 0.71$	–	$213 \pm 76$	$2874 \pm 56$
	Acetone	$6.48 \pm 0.72$	–	$131 \pm 25$	$3169 \pm 117$