Razvoj in karakterizacija optičnih Ru - senzorjev za določanje kisika

diplomsko delo univerzitetnega študijskega programa

Maja Kelc (Author), Mitja Kolar (Mentor), Darinka Brodnjak-Vončina (Co-mentor), Andrej Holobar (Co-mentor)

Abstract

Rutenijevi kompleksi so daleč najbolj razširjeni O2 indikatorji, ker imajo učinkovito luminescenco, relativno stabilen kovina – ligand prenos naboja vzbujenega stanja, hiter odzivni čas, močno vidno absorpcijo, velike Stokes – ove preskoke in visoko fotokemično stabilnost. V diplomski nalogi smo za izdelavo senzorjev uporabili različne koncentracije rutenijevega kompleksa v različnih topilih. Preizkusili smo različne PVC folije uporabljene kot nosilec. Na »Spin – coaterju« smo optimirali program s katerim smo dobili optično gledano najbolj homogene nanose senzorskih raztopin. Senzorje smo izpostavili različnim koncentracijam kisika. Linearnost smo preverili v območju od 0 do 100 % koncentracije kisika. Ugotovili smo linearnost za senzorje pripravljene iz 60 in 80 mg rutenijevega kompleksa. »Spin – coating« se je izkazal kot alternativna metoda za nanos senzorskih raztopin, vendar po celotni senzorski površini ni možno pripraviti homogenega nanosa, kar smo pokazali tudi z opravljenimi SEM posnetki. Za nanašanje senzorskih raztopin na nosilec bi v bodoče uporabili mehanski nanos z natančnim nožem.

Keywords

optični kemijski senzorji;senzorji za določanje kisika;Rutinijevi kompleksi;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[M. Kelc]
UDC:	544.165(043.2)
COBISS:	16693270
Views:	1984
Downloads:	198
Average score:	0 (0 votes)
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Other data

Secondary language:	English
Secondary title:	Development and characterization of optical Ru - sensors for oxygen determination
Secondary abstract:	Ruthenium complexes are by far the most widely used O2 indicators due to their efficient luminescence, relatively long − life metal − tolerant charge transfer when in the excited state, fast response time, strong visible absorption, large Stokes shifts, and high photochemical stability. In this thesis, we used different concentrations of ruthenium complexes in various solvents for sensor production. We used various PVC foils as the carrier. On »Spin – coater«, we optimized the program which helped us get optically most homogeneous sensor coating solutions. The sensors were exposed to various concentrations of oxygen. The linearity was tested in the range from 0 % to 100 % of oxygen concentration. We determined the linearity of sensors which were prepared from 60 to 80 mg of ruthenium complex. To conclude, "Spin − coating" could be an alternative method for the application of sensor solutions, but it is not possible to prepare the homogeneous layer on the whole sensor surface, which was demonstrated via implemented SEM recordings. In the future, it would be better to apply the sensor solutions to the carrier mechanically using the high precision knife.
Secondary keywords:	optical chemical sensors;sensors for oxygen determination;Ruthenium complexes;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XIII, 50 f.
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;chemical structure of matter;kemijska struktura snovi;
ID:	1026078