Design and evaluation of sensory systems based on amphiphilic anthraquinones molecular receptors

Supramolecular Assembly of Planar Systems from Modular Molecules with a Given Hydrophilic–Lipophilic Balance: Film Sensors with an Anthraquinone Signal Group

“…Synthesis of ligands was carried out according to the methods described in [14]; the physicochemical characteristics of the obtained compounds correspond to those published earlier [15]. Chloroform (analytical grade) (Merck) was distilled over CaH2.…”

A metal-responsive interdigitated bilayer for selective quantification of mercury(ii) traces by surface plasmon resonance

“…It shows a regular signal growth with increasing mercury concentration. The sensor is sensitive enough to reliably determine mercury concentrations as low as 10 −11 M (2 ppt) in spiked solutions that is superior to other sensing systems based on the ligand L. 17,21 The semi-log calibration function displayed in Fig. 3A evidences a linearity range spanning 5 decades.…”

“…Noteworthily, chemosensor L retains its high affinity and selectivity towards Hg 2+ once incorporated in a Langmuir monolayer or LB multilayers. 21 Moreover, the strong light-absorbing anthraquinone scaffold of L might also contribute to increase the sensitivity of the SPR system. 22 Bilayer films were prepared on freshly cleaned gold-coated glass slides by the formation of an octanethiol SAM followed by the deposition of a monolayer of L using the vertical top-down LB method (ESI †).…”

“…Interestingly, Hg 2+ uptake by the Au/SAM/LB(L) bilayer does not affect the wetting properties of the film (ϑ = 74.2°and 75.0°), in accordance with the formation of neutral complexes at the surface and the reorientation of the binding units upon complexation, as previously observed at the air/water interface. 21,25 Analytical performances of Au/SAM/LB(L) chips were studied by using a commercial SPR spectrophotometer equipped with a microflow cell. In preliminary experiments, the stability of Au/SAM and Au/SAM/LB(L) was ascertained by observing a constant SPR signal when deionized water was pumped through the cell for up to 40 min at a constant flow A typical SPR sensogram recorded for an Au/SAM/LB(L) chip for mercury(II) concentrations in the range 10 −11 -10 −6 M is reproduced in Fig.…”

Bilayer Porphyrin-Graphene Templates for Self-Assembly of Metal-Organic Frameworks on the Surface

“…Достоинство этого метода состоит в возможности получать однородные образцы на большой площади, а также исследовать взаимодействия водорастворимых частиц, например, катионов, введенных в субфазу, с хромофорным веще-ством (лиганды, рецепторы) монослоя, что позволяет достаточно просто с использованием оптоволоконной электронной спектроскопии определять эффективность соответствующих взаимодействий. [19,20] Практически при любом способе сборки ПОВМОК для их закрепления на поверхности или инициирования «bottom-up» роста используются самоорганизованные монослои тиолатов или силанов. Поскольку самоор-ганизованные монослои подходят далеко не для всех подложек и для формирования на них ПОВМОК часто требуются высокие температуры и длительное время, то существует серьезная проблема адгезии и стабиль-ности покрытий.…”