1. Vicinal Diaryl Heterocyclic System: A Privileged Scaffold in the Discovery of Potential Therapeutic Agents 2. Therapeutic Potential of Vicinal Diaryl Azetidin-2-ones 3. Vicinal Diaryl Pyrroles: Synthesis and Biological Aspects 4. Synthesis and Biological Profiles of 4, 5-, 1, 5- and 1, 2-Diaryl-1H-imidazoles 5. Vicinal Diaryl Pyrazole: A Therapeutically Potential Molecular Scaffold 6. Vicinal Diaryl Triazoles and Tetrazoles 7. Synthesis and Biological Activities of Vicinal Diaryl Furans 8. Vicinal Diaryl Thiazoles and Thiadiazoles 9. Vicinal Diaryl Oxadiazoles, Oxazoles and Isoxazoles 10. Chemical and Biological Profiles of Vicinal Diaryl-substituted Thiophenes, Imidazolines, Selendiazoles and Isoselenazoles 11. Synthesis and Biological Significance of Six- and Seven-membered Vicinal Diaryl Heterocycles 12. Biological Spectrum of Vicinal Diaryl-substituted Fused Heterocycles