Related Experiment Video
Updated: Jan 14, 2026

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
Published on: June 23, 2023
Through-space conjugation engineering in methylated tetraphenylethene derivatives
Feng Gao1, Yanning Xu1, Zeyang Ding1
1Guangdong Basic Research Center of Excellence for Aggregate Science, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, P. R. China. alamparvej@cuhk.edu.cn.
Abstract:
This work reports methylated tetraphenylethene derivatives exhibiting systematically enhanced and blue-shifted emission due to increased methylation-induced steric hindrance and reduced through-space conjugation (TSC). Temperature-dependent photophysical studies show that the TSC strength varies with temperature, weakening at cryogenic temperatures and causing emission blue-shifts. These insights advance the mechanistic understanding of TSC in rigid fluorophores, providing foundational principles for the rational design of tunable TSC-based luminescent materials.
More Related Videos
09:45Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
07:14Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
Related Concept Videos
Hybridization of Atomic Orbitals II
π Molecular Orbitals of 1,3-Butadiene
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
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.
Hybridization of Atomic Orbitals I
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Thermal and Photochemical Electrocyclic Reactions: Overview