Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (2): 20250250.doi: 10.7503/cjcu20250250

• Physical Chemistry • Previous Articles     Next Articles

Theoritical Studies on the Photophysical Properties of 1,4-Dihydropyridine Derivatives

LI Haojing1, GE Changwei1, ZHONG Qidi2, YAN Hong1(), SUN Guohui1   

  1. 1.College of Chemistry and Life Sciences,Beijing University of Technology,Beijing 100124,China
    2.College of Pharmacy,North China University of Science and Technology,Tangshan 063210,China
  • Received:2025-09-08 Online:2026-02-10 Published:2025-11-10
  • Contact: YAN Hong E-mail:hongyan@bjut.edu.cn

Abstract:

Density functional theory(DFT) and time-dependent density functional theory(TD-DFT) methods at the M06-2X/def2-TZVP level were used to systematically reveal the regulatory mechanism of N-1 substituents on the photophysical properties and photocycloaddition reactions of ethyl 1,4-dihydropyridine-3,5-dicarboxylate derivatives(1a—1h). The results demonstrate that the type of N-1 substituent significantly influences the molecular excitation characteristics. Electronic excitations are predominantly characterized by ππ* transitions within the 1,4-dihydropyridine ring. The excited-state charge distribution is highly overlapping and localized in the C=C double bond region of the ring, exhibiting typical localized excitation features. This promotes a nearly planar molecular conformation in the excited state, accompanied by significant bond length changes at key reactive sites, both of which facilitate the occurrence of photocycloaddition reactions. This work establishes a systematic theoretical correlation between the photophysical properties and photocycloaddition reactivity of 1,4-dihydropyridine derivatives, providing important theoretical insights and innovative guidance for designing efficient photochemical eaction systems and constructing polycyclic frameworks.

Key words: 1, 4-Dihydropyridine derivatives, Photophysical property, Density functional theory, Photocycloaddition

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