D8 venture apex 3

¹H and ¹³C NMR
spectra were recorded using a Bruker 500 MHz NMR spectrometer. ESI-MS
mass spectra were recorded on an Advion compact mass spectrometer
(serial no. 3013-0140). Infrared spectra were recorded on a PerkinElmer
FT-IR Spectrum 100 spectrophotometer. UV–vis spectra were recorded
on a CARY 60 spectrophotometer. Solid- and solution-state fluorescence
spectra were recorded in a Varian Cary Eclipse fluorescence spectrophotometer
and a PerkinElmer LS 45 instrument. The X-ray crystallographic data
were taken from Bruker D8 Venture (APEX-III) with a photon detector.
Powder X-ray diffraction (PXRD) analysis was carried out by Bruker
AXS (Germany) with a model no. of D8 FOCUS. FE-SEM analysis was carried
out using Sigma HD, Zeiss, Oxford Instruments, Germany. The change
of particle size before and after the interaction with water and Cu²⁺ was monitored by DLS studies (Zetasizer Nano ZS90). Cyclic
voltammetry was performed in a CH instrument.

The required synthons and solvents are commercially available and were used as obtained. All the TBA⁺X⁻ salts including cyanide, fluoride, chloride, acetate, bromide, nitrates, and carbonates were procured from Sigma Aldrich and iodide and sulphates were purchased from Alfa Aesar. Spectroscopic-grade solvents like acetonitrile, dimethyl sulfoxide and water have been obtained from Merck (India) Pvt. Ltd.
DNMH has been structurally confirmed by mass spectrometry (Advion Make; Serial no. 3013-0140) and ¹H-NMR spectroscopy (Bruker 400 MHz NMR spectrometer). The functional groups within the DNMH scaffold have been authenticated by FT-IR spectroscopy (Spectrum 65, PerkinElmer). X-ray crystallography was performed in a Bruker D8 Venture (APEX-III) diffractometer equipped with a photon detector and assisted by graphite-monochromated Mo Kα (λ = 0.71073 Å) irradiation. A CARY60 spectrophotometer was used to perform the UV-vis spectrophotometric study. Particle size analysis of DNMH and the DNMH + CN⁻ adduct was executed by a dynamic light scattering study (Zetasizer Nano ZS90). Cyclic voltammetry was performed in a CH instrument.