Triglycine sulfate

• TGS
• Triaminoessigsäuresulfat

White solid

Fixed

1.69 g · cm -3

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Triglycine (TGS ) can be formally regarded as an adduct of three moles of glycine and one mole of sulfuric acid. TGS single crystals are used as a detector material in pyroelectric sensors.

Application

Triglycine has a large pyroelectric coefficient. There is a temperature change, for example, by absorption of electromagnetic waves, the polarization changes, and it causes a charge generator, which is directly measured after amplification. For this purpose, the respective Einkristallflächen must be provided with suitable electrodes. With a similar arrangement, temperatures are measured. The Curie temperature of the TGS is 49 ° C. Below this temperature, the polarization change upon change of the incident radiation power, which is measurable in the form of a voltage surge.

Deuterated triglycine

Deuterated triglycine sulfate ( DTGS ) differs from TGS by a complete substitution of all hydrogen atoms by deuterium atoms. The molecular formula is C6D17N3SO10. Also has DTGS pyroelectric properties. DTGS has the CAS number. 17237-73-9 and has a crystalline solid is the molar mass of 340.18 g · mol -1.

DTGS has over TGS the advantage of a higher Curie temperature, this is dependent on the degree of deuteration at 57-62 ° C instead of 49 ° C at TGS. The difference in the Curie temperature has a great influence on the applications of DTGS -based sensors. For example, already in direct sunlight to warm a sensor at 50 ° C. However, above the Curie temperature of the pyroelectric properties are lost and the detector to lose its function. Therefore DTGS sensors offer a broader scope than TGS detectors, especially in the case of a passively -cooled operation.

A further improvement of the pyroelectric properties can be achieved by doping the DTGS crystals with L-alanine, L-alanine doped called deuterated triglycine sulfate ( DLATGS ). By Alanindotierung can be reduced to a sensitivity of the DTGS crystals increases, on the other permanent depolarization at warming above the Curie temperature.

DTGS and DLATGS have gained as a sensor material in the infrared spectroscopy due to their material properties important.