Selective determination of sulphide based on photoluminescence quenching of MPA-capped CdTe nanocrystals by exploiting a gas-diffusion multi-pumping flow method

Rodrigues, S. Sofia M.; Oleksiak, Zuzanna; Ribeiro, David S.M.; Poboży, Ewa; Trojanowicz, Marek; Prior, João A.V.; Santos, João L.M.

doi:10.1039/c4ay01823k

Cited by 15 publications

(5 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…variate calibrations, 164 or fluorimetric determination exploiting a gas-diffusion separation and quantum dot nanocrystals for detection. 165 Another smart and widely recognized approach to enhancing the solutions pumping in flow injection systems are multisyringe flow injection analysis systems (MSFIA), where a single-syringe pump was replaced by a multi-syringe pump, fabricated by adapting a typical mechanized burette of automatic titrators in order to enable a simultaneous movement of four syringes 166,167 (see schematic diagram in Fig. 1E).…”

Section: Measuring Methodologiesmentioning

confidence: 99%

Recent advances in flow injection analysis

Trojanowicz

Kołacińska

2016

Analyst

Self Cite

170

View full text Add to dashboard Cite

A dynamic development of methodologies of analytical flow injection measurements during four decades since their invention has reinforced the solid position of flow analysis in the arsenal of techniques and instrumentation of contemporary chemical analysis. With the number of published scientific papers exceeding 20,000, and advanced instrumentation available for environmental, food, and pharmaceutical analysis, flow analysis is well established as an extremely vital field of modern flow chemistry, which is developed simultaneously with methods of chemical synthesis carried out under flow conditions. This review work is based on almost 300 original papers published mostly in the last decade, with special emphasis put on presenting novel achievements from the most recent 2-3 years in order to indicate current development trends of this methodology. Besides the evolution of the design of whole measuring systems, and including especially new applications of various detections methods, several aspects of implications of progress in nanotechnology, and miniaturization of measuring systems for application in different field of modern chemical analysis are also discussed.

show abstract

Section: Measuring Methodologiesmentioning

confidence: 99%

Recent advances in flow injection analysis

Trojanowicz

Kołacińska

2016

Analyst

Self Cite

170

View full text Add to dashboard Cite

show abstract

“…A similar device developed later on for flow synthesis systems was called a "tube-in-tube reactor" [50]. In modern analytical flow systems, sandwich-type gas diffusion units are frequently used [193]. In flow synthetic systems, hydrogen was introduced to conduct hydrogenation [47], CO 2 was introduced to carry out carboxylation [50], and CO was introduced to perform carbonylation reactions [194].…”

Section: On-line Processes Supporting Flow Analysis and Flow Synthesismentioning

confidence: 99%

Flow Chemistry in Contemporary Chemical Sciences: A Real Variety of Its Applications

Trojanowicz

2020

Molecules

Self Cite

View full text Add to dashboard Cite

Flow chemistry is an area of contemporary chemistry exploiting the hydrodynamic conditions of flowing liquids to provide particular environments for chemical reactions. These particular conditions of enhanced and strictly regulated transport of reagents, improved interface contacts, intensification of heat transfer, and safe operation with hazardous chemicals can be utilized in chemical synthesis, both for mechanization and automation of analytical procedures, and for the investigation of the kinetics of ultrafast reactions. Such methods are developed for more than half a century. In the field of chemical synthesis, they are used mostly in pharmaceutical chemistry for efficient syntheses of small amounts of active substances. In analytical chemistry, flow measuring systems are designed for environmental applications and industrial monitoring, as well as medical and pharmaceutical analysis, providing essential enhancement of the yield of analyses and precision of analytical determinations. The main concept of this review is to show the overlapping of development trends in the design of instrumentation and various ways of the utilization of specificity of chemical operations under flow conditions, especially for synthetic and analytical purposes, with a simultaneous presentation of the still rather limited correspondence between these two main areas of flow chemistry.

show abstract

“…Multiple peaks in the emission spectra of Qdots with a single light source have been reported 2 , 3 . These peaks are affected in a different way, e.g., by the coupling of core–shell 4 , chemical compounds 5 , ions 6 , 7 , air–water surface interface 8 , and surface plasmon resonance 9 . The quenching of Qdots (CdSe) by gold nanoparticles in the vicinity was examined in detail; the distance required for the quenching is estimated at 7.5 nm.…”

Section: Introductionmentioning

confidence: 99%

Surface-dependent quenching of Qdot emission can be a new tool for high resolution measurements

Okura

Tatsumi

2023

Sci Rep

View full text Add to dashboard Cite

Single quantum dots (Qdots) are often used in the field of single-molecule imaging. Qdots are sensitive to changes in the physical interactions between the Qdots and the surrounding materials. However, the spectral changes in a single Qdot emission have not been studied in detail. Low-temperature plasma treatment of glass surfaces reduced the intensity of the 655 nm emission peak of Qdot655 on glass surfaces, but did not significantly change the intensity of the 580 nm emission. Silanization of the glass surface increases the thickness of the silane layer, and the 655 nm emission peak increased. When single Qdots on the untreated glass were imaged, plasma treatment decreased the intensity of red emission and increased yellow emission. When Qdots were brought close to the glass surface in the range of 28–0 nm, the red emission intensity decreased and the yellow emission intensity increased slightly. When single actin filaments were labeled with Qdots, fluctuations of the yellow and red emission of the Qdot were detected, which reflected the very small distance changes. Our results indicate that the local interaction of Qdots with the glass surface improves the spatial and temporal resolution of optical measurements of biomolecules labeled with Qdots.

show abstract

Selective determination of sulphide based on photoluminescence quenching of MPA-capped CdTe nanocrystals by exploiting a gas-diffusion multi-pumping flow method

Abstract: The selective determination of S2-based on photoluminescence quenching of CdTe nanocrystals following gaseous diffusion within a pulsed flow system.

Cited by 15 publications

References 49 publications

Recent advances in flow injection analysis

Recent advances in flow injection analysis

Flow Chemistry in Contemporary Chemical Sciences: A Real Variety of Its Applications

Surface-dependent quenching of Qdot emission can be a new tool for high resolution measurements

Contact Info

Product

Resources

About