Positron annihilation studies on the phase transition of benzene and reactivity of nitrobenzene in confined framework of ZSM-5 zeolite

We present new result on positron annihilation spectroscopic studies on phase transition and reactivity of liquids confined inside ZSM-5. Benzene inside mesopores and micropores of ZSM-5 shows two distinct freezing points. The reactivity of positronium towards nitrobenzene (known quencher of positronium) inside the pores of ZSM-5 is anomalously enhanced.