PMID- 33928783 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20210524 LR - 20210524 IS - 1520-5827 (Electronic) IS - 0743-7463 (Linking) VI - 37 IP - 18 DP - 2021 May 11 TI - A Ratiometric and Visual Sensing of Phosphate by White Light Emitting Quantum Dot Complex. PG - 5506-5512 LID - 10.1021/acs.langmuir.1c00194 [doi] AB - Ratiometric and visual sensing of phosphate by using a white light emitting quantum dot complex (WLE QDC) is reported herein. The WLE QDC comprised of Mn(2+)-doped ZnS quantum dot (with lambda(em) = 585 nm) and surface zinc quinolate (ZnQS(2)) complex (with lambda(em)= 480 nm). The limit of detection was estimated to be of 5.9 nM in the linear range of 16.6-82.6 nM. This was accomplished by monitoring the variations in the photoluminescence color, intensity ratio (I(480)/I(585)), chromaticity and hue of the WLE QDC in the presence of phosphate. The high selectivity and sensitivity of WLE QDC toward phosphate was observed. The chemical interaction of ZnQS(2) (present in WLE QDC) with phosphate might have led to the observed specificity in photoluminescence changes. The presented WLE QDC was successfully employed for the quantification of phosphate in samples prepared using environmental water and commercial fertilizer. FAU - Manna, Mihir AU - Manna M FAU - Roy, Shilaj AU - Roy S FAU - Bhandari, Satyapriya AU - Bhandari S AUID- ORCID: 0000-0002-9150-6212 AD - Department of Chemistry, University of North Bengal, Raja Rammohunpur, Darjeeling, West Bengal 734013, India. FAU - Chattopadhyay, Arun AU - Chattopadhyay A AUID- ORCID: 0000-0001-5095-6463 LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210430 PL - United States TA - Langmuir JT - Langmuir : the ACS journal of surfaces and colloids JID - 9882736 SB - IM EDAT- 2021/05/01 06:00 MHDA- 2021/05/01 06:01 CRDT- 2021/04/30 08:38 PHST- 2021/05/01 06:00 [pubmed] PHST- 2021/05/01 06:01 [medline] PHST- 2021/04/30 08:38 [entrez] AID - 10.1021/acs.langmuir.1c00194 [doi] PST - ppublish SO - Langmuir. 2021 May 11;37(18):5506-5512. doi: 10.1021/acs.langmuir.1c00194. Epub 2021 Apr 30.