TY - CONF A1 - Kovalchuck, Anton V. A1 - Rurack, Knut A1 - Bricks, J. A1 - Slominskii, J.L. T1 - A new bifunctional fluoroionophore T2 - XIX IUPAC Symposium on Photochemistry CY - Budapest, Hungary DA - 2002-07-14 PY - 2002 AN - OPUS4-10945 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rurack, Knut A1 - Trieflinger, C. A1 - Kovalchuck, Anton V. A1 - Daub, J. T1 - An ionically driven molecular IMPLICATION gate operating in fluorescence Mode N2 - An asymmetrically core-extended boron-dipyrromethene (BDP) dye was equipped with two electron-donating macrocyclic binding units with different metal ion preferences to operate as an ionically driven molecular IMPLICATION gate. A Na+-responsive tetraoxa-aza crown ether (R2) was integrated into the extended π system of the BDP chromophore to trigger strong intramolecular charge transfer (ICT2) fluorescence and guarantee cation-induced spectral shifts in absorption. A dithia-oxa-aza crown (R1) that responds to Ag+ was attached to the meso position of BDP in an electronically decoupled fashion to independently control a second ICT1 process of a quenching nature. The bifunctional molecule is designed in such a way that in the absence of both inputs, ICT1 does not compete with ICT2 and a high fluorescence output is obtained (InA=InB=0→Out=1). Accordingly, binding of only Ag+ at R1 (InA=1, InB=0) as well as complexation of both receptors (InA=InB=1) also yields Out=1. Only for the case in which Na+ is bound at R2 and R1 is in its free state does quenching occur, which is the distinguishing characteristic for the InA=0 and InB=1→Out=0 state that is required for a logic IMPLICATION gate and Boolean operations such as IF-THEN or NOT. KW - Charge transfer KW - Dyes/pigments KW - Fluorescence KW - Logic gates KW - Molecular devices PY - 2007 DO - https://doi.org/10.1002/chem.200700858 SN - 0947-6539 SN - 1521-3765 VL - 13 IS - 32 SP - 8998 EP - 9003 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-16085 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kovalchuck, Anton V. A1 - Rurack, Knut A1 - Bricks, J.L. T1 - New Anion-Sensitive Fluorescent Probes T2 - 8th Conference on Methods and Applications of Fluorescence: Spectroscopy, Imaging and Probes CY - Prague, Czech Republic DA - 2003-08-24 PY - 2003 AN - OPUS4-4891 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bricks, J.L. A1 - Kovalchuck, Anton V. A1 - Trieflinger, C. A1 - Nofz, Marianne A1 - Büschel, M. A1 - Tolmachev, A.I. A1 - Daub, J. A1 - Rurack, Knut T1 - On the Development of Sensor Molecules that Display FeIII-amplified Fluorescence N2 - Incorporation of a tailor-made size-restricted dithia-aza-oxa macrocycle, 1-oxa-4,10-dithia-7-aza-cyclododecane, via a phenyl linker into two fluorescent sensor molecules with electronically decoupled, rigidly fixed, and sterically preoriented architectures, a 1,3,5-triaryl-2-pyrazoline and a meso-substituted boron-dipyrromethene (BDP), yields amplified fluorescence in the red-visible spectral range upon binding of FeIII ions. The response to FeIII and potentially interfering metal ions is studied in highly polar aprotic and protic solvents for both probes as well as in neat and buffered aqueous solution for one of the sensor molecules, the BDP derivative. In organic solvents, the fluorescence of both indicators is quenched by an intramolecular charge or electron transfer in the excited state and coordination of FeIII leads to a revival of their fluorescence without pronounced spectral shifts. Most remarkably, the unbound BDP derivative shows dual emission in water and can be employed for the selective ratiometric signaling of FeIII in buffered aqueous solutions. KW - Fluoreszenz KW - Eisen KW - Fluoreszenzmarker PY - 2005 DO - https://doi.org/10.1021/ja050652t SN - 0002-7863 SN - 1520-5126 VL - 127 SP - 13522 EP - 13529 PB - American Chemical Society CY - Washington, DC AN - OPUS4-12180 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kovalchuck, Anton V. A1 - Bricks, Julia A1 - Reck, Günter A1 - Rurack, Knut A1 - Schulz, Burkhard A1 - Szumna, A. A1 - Weißhoff, Hardy T1 - A charge transfer-type fluorescent molecular sensor that "lights up" in the visible upon hydrogen bond-assisted complexation of anions PY - 2004 DO - https://doi.org/10.1039/b405207b SN - 0022-4936 SN - 0009-241x SN - 1359-7345 SN - 1364-548x SP - 1946 EP - 1947 PB - Royal Society of Chemistry CY - Cambridge AN - OPUS4-4123 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -