الفهرس 
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Abstract
The present work aimed to synthesize novel heterocyclic compounds containing sulphure, phosphorous, and silicon by ultrasound induced 1,3-dipolar cycloaddition as an alternative clean energy. PANI is favored because of its characteristics as a conductive electro active polymer to be used in different purposes such as electrical conductive, batteries, chemical and biological sensors, coating and corrosion protection.
The synthesized PANI, Nano PANI cycloadducts were evaluated via different criteria:
1- Electrical conductivity.
2- Antimicrobial and macro biofouling.
The prepared nano polyaniline cycloadducts with phosphorus showed the highest activity followed by those with silicon then by those with sulphure.
3- Environmental safety (toxicity test)
The prepared nano cycloadducts showed almost low or no activity against representative of non-target sea organisms.