Laser-induced electron transfer desorption/ionization of metal complexes on TiO2 films

18th International School on Condensed Matter Physics: "Challenges of Nanoscale Science: Theory, Materials, Applications"

Grechnikov, A.A.^1,5 ; Georgieva, V.^2 ; Borodkov, A.S.^1,5 ; Nikiforov, S.M.^3 ; Raicheva, Z.^2 ; Lazarov, J.^2 ; Donkov, N.^4

Vernadsky Institute of Geochemistry and Analytical Chemistry of RAS, Kosygin str. 19, Moscow

119991, Russia^1

Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee blvd., Sofia

1784, Bulgaria^2

General Physics Institute of RAS, Vavilov str. 38, Moscow

119991, Russia^3

Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee blvd., Sofia

1784, Bulgaria^4

Energomashtekhnika Ltd., prospect Vernadskogo b.2, Moscow

123, 119571, Russia^5

关键词: Analyte concentration;    Desorption/ionization;    Electrospray deposition;    Limits of detection;    Relative standard deviations;    Silicon substrates;    Time-of-flight mass spectrometers;    Titanium dioxides (TiO2);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/558/1/012035/pdf
DOI  :  10.1088/1742-6596/558/1/012035

来源: IOP

【 摘 要 】

Thin titanium dioxide (TiO2) films were studied as ion emitters for the laser-induced electron transfer desorption/ionization (LETDI) of metal complexes with organic reagents. The TiO2films (350 nm thick) were deposited on the silicon substrates by e-beam evaporation of TiO2powder. Copper complex with phthalocyanine, rhenium complex with thiocarbanilide and platinum complex with 8-quinolinethiol were studied as the test analytes. Reflectron time-of- flight mass spectrometer with the rotating ball interface was used for analysis. The analytes were applied on the surface of TiO2film using an electrospray deposition. All tested compounds are detected as the radical molecular ions with no fragmentation. It is found, that TiO2films are very stable and show good sensitivity in examined range of the analyte concentrations. The limits of detection of studied complexes were at the subfemtomole range, and the relative standard deviation was less than 10%.