Related Experiment Video
Updated: Feb 20, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Click chemistry-driven heteromolecular integration into layered zeolite frameworks for photochemical upconversion
Fuminao Kishimoto1, Kyohei Hisano2, Toru Wakihara1,3
1Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. kfuminao@chemsys.t.u-tokyo.ac.jp.
None:
Organic-inorganic hybrid layered porous materials enabling triplet-triplet annihilation upconversion (TTA-UC) were developed by integrating anthracene-based emitters and metal-complex sensitizers within zeolitic nanospace. Diphenylanthracene (DPA) units were covalently anchored between MWW-type layers via thiol-ene click chemistry, forming organic pillars that generated ordered interlayer micropores, confirmed by XRD and N2 adsorption. Incorporation of cationic chromophores and Pt(octaethylporphyrin) [Pt(OEP)] enabled efficient intermolecular energy transfer. Upon 535 nm excitation, Pt(OEP)-loaded samples exhibited phosphorescence at 650 nm and upconverted emission at 400-500 nm. This work highlights a rational strategy for tuning nanoscale photochemical behavior via host-guest engineering in layered hybrid systems.
More Related Videos
Related Concept Videos
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Cycloaddition Reactions: MO Requirements for Photochemical Activation
Thermal and Photochemical Electrocyclic Reactions: Overview
Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.

