Abstract
Phosphate arginine (PA) has been known as the medium carriers for bioenergy storage, while the similar structural substance L-arginine phosphate monohydrate (LAP) crystal is an excellent nonlinear optical crystal with a high laser-induced damage threshold. Energy storage in organism and laser-induced damage in crystals are both correlative to energy. Temperature dependence X-ray diffraction (XRD) and solid state NMR spectroscopy were performed to explore the impact of energy (heat and magnetic) fields on LAP crystal. XRD results reveal that LAP processes a reversible specific phase transition as the temperature changed. Saturation recovery experiments have shown that the crystal has a long proton spin-lattice relaxation time (1H T1) of 184 s with an amazing solid-state stability. The nuclear magnetic resonance (NMR) and fluorescence emission spectra of LAP solution compared with several amino salt solutions have also been investigated. The results show that the emission wavelength of LAP solution is blue-shifted from 415 to 380 nm. When energy (laser, heat, magnetic and etc.) fields are applied on LAP crystal, it processes a various of distinctive properties which make LAP a special material worthy of further detailed investigation.
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