Optical Properties of Single- and Double-Functionalized Small Diamondoids
Chandra Shekar Sarap1, Bibek Adhikari1, Sheng Meng2
1Institute for Computational Physics , Universität Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany.
The Journal of Physical Chemistry. A
|March 1, 2018
Summary
Functionalizing diamondoids with -NH2 groups preserves UV photoluminescence, while -SH groups hinder it. Double-functionalized diamondoids can act as sensitive probes for biomolecule binding and environmental sensing.
Area of Science:
- Materials Science
- Quantum Chemistry
- Nanotechnology
Background:
- Diamondoids are unique diamond-like molecules with tunable electronic and optical properties.
- Controlling these properties is key for advanced optoelectronic applications.
Purpose of the Study:
- To investigate the impact of -NH2, -SH, and N-heterocyclic carbene (NHC) functionalization on diamondoid properties.
- To predict changes in optical properties, particularly UV photoluminescence.
- To explore potential applications in sensing and self-assembled monolayers.
Main Methods:
- Electronic structure calculations were employed.
- Investigated single- and double-functionalization of adamantane, diamantane, and triamantane.
- Analyzed the effects of -NH2, -SH, and NHC functional groups.
Main Results:
- -NH2 functionalization maintains UV photoluminescence.
- -SH functionalization quenches UV photoluminescence due to S-H bond lability.
- Double functionalization with -NH2 and -SH creates sensitive probes.
- NHC functionalization preserves diamondoid properties for self-assembled monolayers.
Conclusions:
- Selective functionalization offers a pathway to tune diamondoid properties.
- Functionalized diamondoids show promise for optoelectronic devices, biosensing, and environmental monitoring.
- This work enables the design of diamondoid-based materials with tailored optical responses.
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