Question

what are the ways to reduce the HOMO-LUMO gap of a molecule?

Answer 1

HOMO-Highest energy Occupied Molecular orbital.

LOMO-Lowest energy Occupied Molecular Orbital.

This indicate distance between 2 orbital of higher and lower molecular orbital.

As distance increase KE and unstability increase as distance increases. The gap is measured by difference between potential of orbital gap.

Following are the ways to decrease homo lumo gap of molecule:-

1)By increasing conjugate length Homo lumo gap of molecule can be decreased

2)By smaller decrease in transmission medium.