Ft ir 4100 ft ir spectrometer

All the chemicals were commercial products and were used as supplied. Elemental analyses (C, H, and N) were obtained at the Elemental Analysis Service Centre of Kyushu University. IR spectra were recorded on a JASCO FT/IR-4100 FT-IR spectrometer. Magnetic susceptibility measurements were made on a Quantum Design MPMS-XL5 susceptometer with scan rates of 1 K min⁻¹ for 2–20 K and 2 K min⁻¹ for 20–300 K at 5 kOe. The isothermal magnetization was measured on a Quantum Design MPMS-XL5 susceptometer at 2 K in an applied field up to 50 kOe. The magnetic correction for the sample holder was performed by measurement for the empty polyethylene film inside a plastic straw. The susceptibilities were corrected for the diamagnetism of the constituent atoms using Pascal's constants. X-band ESR spectra were recorded at room temperature (rt) and 77 K on JEOL JES-TE300 ESR spectrometer. Experimental conditions: ν = 9.44790 (rt) and 9.19431 (77 K) GHz; microwave power = 4.0 mW; modulation frequency = 100 kHz; modulation width = 10.0 G. The powder electronic spectra were recorded on Shimadzu UV-3100 spectrometer that was equipped with an integrating sphere in the 200–2000 nm region.

p16^INK4A (80 μM) samples were treated with 50 mM H₂O₂ overnight in buffer (4 mM HEPES pH 7.5), then dialysed against water overnight. Spectra were recorded on a JASCO FT/IR-4100 FT-IR spectrometer with attenuated total reflectance (ATR) attachment. The samples were measured with 128 scans at a resolution of 2 cm⁻¹ at room temperature.

UV–Vis absorption and PL spectroscopy were carried out using a Cary 8454 UV–Vis spectrophotometer and FluoroMax‐3 fluorescence spectrophotometer (Horiba), respectively. PL QYs were measured using the comparison approach using Rhodamine 6G in ethanol (PL QY = 95%) as a standard. Transmission electron microscopy (TEM) was performed using a JEOL 3100R05 electron microscope operating at a beam voltage of 300 kV. X‐ray photoelectron spectroscopy (XPS) was performed using a Kratos Axis Ultra XPS. Fourier‐transform infrared (FTIR) spectroscopy was carried out using JASCO (FT/IR‐4100) FTIR spectrometer. Nuclear magnetic resonance (NMR) spectroscopy was performed using Bruker Advance Neo 500 spectrometer. Circular dichroism (CD) spectroscopy was carried out using a J‐815 CD spectrometer (JASCO, Japan) operating under a N₂ flow of 5–8 l/min. Typical scanning parameters were as follows: scanning speed, 100 nm/min; data pitch, 1 nm; bandwidth, 1 nm, digital integration time, 2 sec; and one accumulation. The anisotropy factor (g‐factor) was calculated according to the equation g = CD/(32,980·Abs), where CD is the signal obtained from CD/DC channel (in mdeg) and Abs is the total absorbance. CD spectra were stopped at wavelengths where the hydrothermal voltage exceeded 400 V to avoid artifacts during acquisition.