{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T03:21:48Z","timestamp":1791516108392,"version":"4.3.4"},"reference-count":41,"publisher":"Wiley","issue":"21","license":[{"start":{"date-parts":[[2022,4,28]],"date-time":"2022-04-28T00:00:00Z","timestamp":1651104000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2022,4,28]],"date-time":"2022-04-28T00:00:00Z","timestamp":1651104000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81573678"],"award-info":[{"award-number":["81573678"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2022,5]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Red fluorescent carbon dots (r\u2010CDs) with narrow dual emissions (600\u00a0nm and 658\u2013683\u00a0nm, full width at half\u2010maximums (FWHMs) of 20\u00a0nm and 30\u00a0nm), fluorescence quantum yield of 41.0%, and yield of 83.3% are prepared by hydrothermal method using\n                    <jats:italic>o<\/jats:italic>\n                    \u2010phenylenediamine as precursor and inorganic oxidant as yield enhancer, and they have graphite nitrate\u2010like structures. The long\u2010wavelength side emission is aggregation\u2010induced emission (AIE). A logarithmic relationship between the AIE wavelength (\n                    <jats:italic>y<\/jats:italic>\n                    ) and the concentration (\n                    <jats:italic>x<\/jats:italic>\n                    ) (\n                    <jats:italic>y<\/jats:italic>\n                    \u00a0=\u00a08.853ln(\n                    <jats:italic>x<\/jats:italic>\n                    )\u00a0+\u00a0688.53,\n                    <jats:italic>R<\/jats:italic>\n                    \u00a0=\u00a00.998) is found. This regularity and the high monochromaticity of AIE are related to the existence of highly ordered structures proved by X\u2010ray diffraction. Its intrinsic emission (FWHM: 20\u00a0nm) is the narrowest among the r\u2010CDs prepared by hydrothermal method. The reason is that the decrease of oxygen content makes the FWHMs become narrow, and the decrease of the pyridine nitrogen content and the increase of pyrrole nitrogen content make them narrower further. The Fourier\u2010transform infrared spectra and control experiment prove that oxidative polymerization is a necessary preparation step. The linear relationship between the amount of the oxidant and the CDs yield indicates that the yield can be increased only by increasing the conversion rate of the polymerization process.\n                  <\/jats:p>","DOI":"10.1002\/adma.202201031","type":"journal-article","created":{"date-parts":[[2022,3,30]],"date-time":"2022-03-30T08:39:52Z","timestamp":1648629592000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":136,"title":["Hydrothermal Synthesis of High\u2010Yield Red Fluorescent Carbon Dots with Ultra\u2010Narrow Emission by Controlled O\/N Elements"],"prefix":"10.1002","volume":"34","author":[{"given":"Yingmei","family":"Xian","sequence":"first","affiliation":[{"name":"School of Pharmacy Guangdong Pharmaceutical University  Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0158-105X","authenticated-orcid":false,"given":"Kang","family":"Li","sequence":"additional","affiliation":[{"name":"School of Pharmacy Guangdong Pharmaceutical University  Guangzhou 510006 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