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Related Concept Videos

Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation

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Updated: Jul 16, 2026

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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Remote Modification-Induced Butterfly Effect on Nonfullerene Acceptor Aggregation for Efficient Organic Solar Cells

Renjie Xu1,2,3, Yuanyuan Jiang1,2,3, Jiadong Zhou4

  • 1Center For Future Organic Optoelectronics, Global Institute of Future Technology (GIFT), Shanghai Jiao Tong University, Shanghai, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|July 15, 2026
PubMed
Summary

No abstract available in PubMed .

Keywords:
intermolecular packingnonfullerene acceptornon‐radiative energy lossorganic solar cell

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