title: Mechano-fluorochromic Pt(II) Luminogen and Its Cysteine Recognition.
abstract: A new triphenylamine-based organometallic Pt(II) luminogen (1) and its analogous organic compound (2) are reported. The molecules are decorated with aldehyde functionality to improve their photophysical properties by utilising donor-acceptor interactions. The single crystal X-ray structure analysis of Pt(II) analogue 1 revealed that the neighbouring molecules were loosely organised by weak intermolecular C-H⋅⋅⋅π interactions. Because of the twisted nature of the triphenylamine backbone the compounds showed aggregation-induced emission enhancement in THF/water mixture. Due to their loose crystal packing, upon application of external stimuli these luminogens exhibited mechano-fluorochromic behaviour. The crystalline forms of the compounds displayed a more superior emission efficiency than the grinded samples. Moreover, the compounds showed crystallization-induced emission enhancement (CIEE) and exhibited chemodosimetric response towards cysteine under physiological condition.
authors.affiliation: Indian Institute of Science, Department Inorganic and Physical Chemistry, Yesvanthpur, Bangalore, 560012, India.
authors.forename: Aniket
authors.initials: A
authors.lastname: Chowdhury
authors.affiliation: Indian Institute of Science, Department Inorganic and Physical Chemistry, Yesvanthpur, Bangalore, 560012, India.
authors.forename: Prodip
authors.initials: P
authors.lastname: Howlader
authors.affiliation: Indian Institute of Science, Department Inorganic and Physical Chemistry, Yesvanthpur, Bangalore, 560012, India. psm@ipc.iisc.ernet.in.
authors.forename: Partha Sarathi
authors.initials: PS
authors.lastname: Mukherjee
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D003460:Crystallization; D003545:Cysteine / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D009944:Organoplatinum Compounds / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D009944:Organoplatinum Compounds; D003545:Cysteine
keywords: coordination compounds; fluorescence; organometallic chemistry; platinum; sensing