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Updated: Apr 1, 2026
16:11
Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
2.9K
Charge-transfer complex versus σ-complex formed between TiO2 and bis(dicyanomethylene) electron acceptors
Jun-ichi Fujisawa1, Morio Nagata, Minoru Hanaya
1Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan. jfujisawa@gunma-u.ac.jp.
Physical Chemistry Chemical Physics : PCCP
|September 30, 2015
Summary
Novel organic-inorganic hybrid materials combine titanium dioxide (TiO2) nanoparticles with bis(dicyanomethylene) (TCNX) acceptors. Material properties and light absorption are controlled by TCNX electron affinity, enabling efficient light-energy conversion applications.
Area of Science:
- Materials Science
- Nanotechnology
- Photochemistry
Background:
- Titanium dioxide (TiO2) nanoparticles are widely used in photocatalysis and energy conversion.
- Organic-inorganic hybrid materials offer tunable properties for advanced applications.
- Bis(dicyanomethylene) (TCNX) compounds are potent electron acceptors.
Purpose of the Study:
- To synthesize and characterize novel TiO2-TCNX hybrid materials.
- To investigate the influence of TCNX electron affinity on material structure and optical properties.
- To explore the potential of these materials for light-energy conversion.
Main Methods:
- Synthesis of TiO2-TCNX complexes via nucleophilic addition reactions.
- Systematic variation of TCNX electron affinity.
- Structural analysis and characterization of visible-light absorption properties.
- Evaluation of light-to-current conversion efficiency.
Main Results:
- Two types of TiO2-TCNX complexes were formed: σ-bonded and charge-transfer (CT) complexes.
- σ-bonded complexes exhibit interfacial charge-transfer (ICT) transitions.
- CT complexes, formed with lower electron affinity TCNX, show strong visible-light absorption due to interfacial electronic transitions.
- CT complexes demonstrate efficient light-to-current conversion.
Conclusions:
- The formation of TiO2-TCNX complexes is selectively controlled by TCNX electron affinity.
- Materials with CT complexes show high potential for light-energy conversion applications.
- This work expands the understanding of organic-inorganic hybrid materials for optoelectronic devices.
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