900-50-5Relevant academic research and scientific papers
Triethylammonium picrate: An above-room-temperature phase transition material to switch quadratic nonlinear optical properties
Asghar, Muhammad Adnan,Zhang, Jing,Han, Shiguo,Sun, Zhihua,Ji, Chengmin,Zeb, Aurang,Luo, Junhua
, p. 285 - 288 (2018)
To switch quadratic nonlinear optical (NLO) effects has become an exciting branch of the NLO material science. However, solid-state molecular crystals showing tunable and switchable NLO behaviors remain scarce. Here, we report an organic picrate-based binary molecular crystal, triethylammonium picrate (TEAP), which undergoes an above-room-temperature phase transition at Tc = 319 K, being solidly confirmed by the thermal and dielectric measurements. A large thermal hysteresis of ～7 K discloses the first-order feature for its phase transition. More strikingly, the quadratic NLO effects of TEAP can be switched in the vicinity of Tc. That is, TEAP exhibits NLO-active response of ～1.5 times as large as that of KDP below Tc (i.e., NLO-on state), while its NLO effects totally disappear above Tc (NLO-off state). Structure analyses disclose that the order-disorder transformations of triethylammonium cations and picrate anions collectively contribute to its phase transition, as well as switchable NLO behaviors. This work opens up a new pathway to the designing and assembling of stimuli-responsive materials.
Design, synthesis and investigations of a series of energetic salts through the variation of amines and concentration of picrate anions
Dharavath, Srinivas,Ghule, Vikas D.,Kumar, Nikhil,Mathpati, Ramling S.,Paul, Avijit Kumar,Tittal, Ram Kumar
, p. 4842 - 4852 (2020/08/17)
Eight new energetic salts combining N-bases (amines) with picrate ions were synthesized in high yields and characterized by NMR (1H and 13C), IR spectroscopy, elemental analysis, and differential thermal analysis. Single-crystal structural studies were pe
Synthesis, structural, spectroscopic and optical studies of charge transfer complex salts
Manikandan, Maruthappan,Mahalingam, Thaiyan,Hayakawa, Yasuhiro,Ravi, Ganesan
, p. 178 - 183 (2013/02/22)
New charge transfer molecular complex adducts of picric acid (C 6H3N3O7) with triethylamine (C 6H15N) and dimethylformamide (HCON(CH3) 2) were synthesized successfully
Infrared Spectroscopic Studies of Hydrogen Bonding in Triethylammonium Slats. Part 4. Rearrangement of Hydrogen-bonded Ion Pairs of Triethylammonium Salts caused by Interaction with Tetrabutylammonium Salts in Solution
Mashkovsky, Alexander A.,Nabiullin, Ahat A.,Odinokov, Stanislav E.
, p. 1879 - 1884 (2007/10/02)
Rearrangement of triethyl- and tetrabutylammonium salts in chloroform solution has been revealed from the characteristic features of the ν(N+H) bands caused by Fermi resonance interaction.Temperature changes of the i.r. spectra show this process to be reversible.Rearrangement constant K1 and K-1 and enthalpies -ΔH (for some cases only) of this process have been determined by measuring the total integrated intensities of the ν(N+H) bands of complexes which are in equilibrium.K1 values of the tetrabutylammonium salts increase with decreasing hydrogen bonding strength in triethylammonium salts.The measured enthalpies of rearrangement and those calculated from the ν(N+H) bands of hydrogen-bonded complexes studied are in agreement.It has also been shown that tetrabutylammonium salts anions can participate in the rearrangement of hydrogen-bonded ion pairs like the organic bases studied previously.
