Growth and characterization of an organometallic nonlinear optical crystal of manganese mercury thiocyanate (MMTC)

Growth and characterization of diaquatetrakis (thiocyanato) cobalt (II) mercury (II) N-methyl-2-pyrolidone (CMTWMP) single crystals

“…The work hardening coefficient (n) is found to be lesser than 2 (n ¼ 1.61099), which supports the concept of Onitsch [19]. CMTWMP is one of the laser materials belonging to the family of organometallic complex crystals whose Vickers hardness is relatively high when compared with the other organometallic counterparts such as MMTC, CMTD and CTA [8].…”

“…The absence of absorption in the entire visible and part of UV region makes the CMTWMP single crystal, a potential candidate material for second harmonic generation in the visible region, especially in blue-violet and near infrared region. When compared with other organometallic complex crystals such as CMTD (360 nm) [3], MMTD (375 nm) [5], MMTC (373 nm) [8] and TMTZ (365 nm) [13], the cutoff wavelength of CMTWMP is low, which is an added advantage for NLO applications.…”

“…The NLO test on CMTWMP reveals its low SHG efficiency when compared with other crystals such as CMTC [1], MMTC [8] and ZCTC [9] in the thiocyanate family. The laser damage threshold of CMTWMP was carried out using laser setup in a single-shot mode and it was found to be about 11.2 GW/cm 2 , which indicates the suitability of this crystal for NLO applications and the data is almost comparable with other popular NLO crystals like MMTC, KDP, urea and BPO [8,14,15]. A comparison of SHG efficiencies and laser damage threshold is presented in Tables 2 and 3.…”

“…The metal ligand bonding in organometallics gives rise to the large macroscopic nonlinearities and excellent physicochemical stabilities due to the transfer of electron density between the metal atoms and the conjugated ligand systems [7]. Crystals such as cadmium mercury thiocyanate (CMTC) [1], manganese mercury thiocynate (MMTC) [8], zinc mercury thiocynate (ZCTC) [9] and diaquatetrakis (thiocyanato) manganese (II) mercury (II) N-methyl-2-pyrolidone (MMTWMP) [10] belongs to this category of materials. Though there are detailed reports on CMTC, MMTC, ZCTC and MMTWMP, no systematic study on the physicochemical properties of CMTWMP has been reported.…”

Synthesis, growth and characterization of nonlinear optical diaqua (thiocyanato) manganese mercury-N,N-dimethylacetamide single crystals

“…The dielectric constant has a higher value in the lower-frequency region (1 kHz), and then decreases with the applied high frequency of 5 MHz. The dielectric constant has a higher value in the lower-frequency region (5 Hz) and then it decreases with the applied frequency of 5 MHz, which is similar to that of MMTC [16].…”