{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:49:00Z","timestamp":1760150940648,"version":"build-2065373602"},"reference-count":40,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2022,1,29]],"date-time":"2022-01-29T00:00:00Z","timestamp":1643414400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82073475"],"award-info":[{"award-number":["82073475"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Major Basic Research Projects of Shandong Natural Science Foundation","award":["ZR2020ZD36"],"award-info":[{"award-number":["ZR2020ZD36"]}]},{"name":"Graduate Student Innovation Research Project of Northeast Petroleum University","award":["JYCX_CX03_2018"],"award-info":[{"award-number":["JYCX_CX03_2018"]}]},{"name":"Project of Jilin Provincial Department of Health","award":["ZYXWST2021061"],"award-info":[{"award-number":["ZYXWST2021061"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A typical and environment-friendly fluorescent polyamine-amine (PAMAM) features good compatibility and unique surface modification, while it is restricted by a low fluorescence property performance and an unclear fluorescence mechanism. In this work, we prepared blue fluorescent PAMAM polymer dots (PDs) via a simple hydrothermal method based on dichloromethane (DCM) and 2.0G PAMAM. The quantum yield achieved was 32.1%, which was 25 times stronger than that of 2.0G PAMAM due to the lone-pair electron leap of the amine groups, the aggregation of carbonyl groups, as well as the crosslinking induced by DCM inside the PAMAM. In addition, the fluorescent 2.0G PAMAM-DCM PDs show a great Fe3+ sensing property with the detection limit of 56.6 nM, which is much lower than the safety limits (5.36 \u03bcM) in drinking water, indicating its great potential for Fe3+ detection in aqueous media.<\/jats:p>","DOI":"10.3390\/s22031075","type":"journal-article","created":{"date-parts":[[2022,1,30]],"date-time":"2022-01-30T00:12:56Z","timestamp":1643501576000},"page":"1075","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Intrinsic Blue Fluorescence of 2.0G PAMAM-DCM Polymer Dots and Its Applications for Fe3+ Sensing"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0800-6752","authenticated-orcid":false,"given":"Xin","family":"Wang","sequence":"first","affiliation":[{"name":"College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2376-9413","authenticated-orcid":false,"given":"Weiguang","family":"Shi","sequence":"additional","affiliation":[{"name":"College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China"},{"name":"Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuda","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Cell Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dan","family":"Cheng","sequence":"additional","affiliation":[{"name":"Daqing Ecological Environment Monitoring Center, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiahui","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shihan","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Bioengineering, University of Washington, Seattle, WA 98195, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Biao","family":"Dong","sequence":"additional","affiliation":[{"name":"State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiao","family":"Sun","sequence":"additional","affiliation":[{"name":"Department of Cell Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2227","DOI":"10.1016\/j.nano.2018.07.005","article-title":"Cytotoxicity and in vivo plasma kinetic behavior of surface-functionalized PAMAM dendrimers","volume":"14","author":"Diaz","year":"2018","journal-title":"Nanomed. 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