Tsis ntev los no, Sensing Technology Laboratory ntawm Shanghai Institute of Microsystems thiab Information Technology, Suav Academy ntawm Kev Tshawb Fawb (SIIST) tau ua qhov tseem ceeb hauv kev tshawb fawb ntawm nyias zaj duab xis fluorescent sensors. Txoj haujlwm no muab lub tswv yim zoo rau kev npaj cov yeeb yaj kiab zoo tshaj plaws fluorescent sensors, thiab sim tshawb xyuas thiab theoretically xam cov txheej txheem sib koom ua ke ntawm fluorescence sensing thiab gas adsorption.
Nyob rau hauv xyoo tas los no, nyias-zaj duab xis fluorescent sensors tau ua lub luag haujlwm tseem ceeb hauv kev ntsuas roj, tshwj xeeb tshaj yog nyob rau hauv kev paub txog kev phom sij xws li tawg, paj hlwb thiab tshuaj. Vim lawv cov rhiab heev, kev teb thiab kev xaiv, lawv yog ib qho ntawm cov thev naus laus zis zoo tshaj plaws rau kev tshawb nrhiav cov tshuaj lom neeg. Txawm li cas los xij, feem ntau cov ntaub ntawv fluorescent rhiab heev los ntawm kev sib sau ua ke fluorescence quenching (ACQ) cov nyhuv thiab photobleaching phenomenon, uas ua rau cov khoom siv fluorescent sensing uas ua tau raws li qhov yuav tsum tau muaj ntawm cov kev siv tsis tshua muaj. Qhov no txwv tsis pub siv cov khoom siv fluorescent rhiab heev hauv kev tshawb nrhiav roj, thiab yuav tsum tau tsim kho cov ntaub ntawv muaj txiaj ntsig zoo tshiab rau kev ntsuas roj. Lub hom phiaj ntawm cov teeb meem ntawm cov khoom tsis zoo hauv lub xeev fluorescence quantum efficiency thiab cov duab tsis zoo tau ntsib los ntawm cov ntaub ntawv nyias nyias organic fluorescent sojntsuam, cov kws tshawb fawb tau tsim ib hom tshiab ntawm tus tswv tsev-cov qhua nyias-zaj duab xis fluorescent gas sensor nrog siab 3S (rhiab heev, selectivity, stability. ) rau cov roj analytes los ntawm piggybacking ib tug organic fluorescent qhua mus rau ib tug hlau-organic moj khaum (MOF), uas muab ib tug saj zawg zog txoj kev rau tsim nyias-film fluorescent sensors los siav ntau yam kev xav tau. hloov mus kom ze.
Hauv kev ua haujlwm no, ACQ molecule Me4BOPHY-1 tau siv los ua cov qhua tuaj noj mov, uas tau muab tso rau hauv cov txheej txheem hlau-organic ZIF-8 siv cov txheej txheem yooj yim-theem synthesis, thiab nws cov fluorescence emission yam ntxwv tau kho los ntawm kev kho qhov sib piv ntawm kev thauj khoom.The MOFs (ZIF-8) muab cov qhua molecule nrog lub MOFs (ZIF-8) muab ntau yam nanocavities rau cov qhua molecules, yog li txo tus kheej-aggregation ntawm fluorescent. molecules thiab kov yeej cov nyhuv ACQ ntawm Me4BOPHY-1. Lub solid-state fluorescence quantum efficiency (QY) ntawm cov molecule tau nce los ntawm 0.76% mus rau 19.72% nrog sib txawv piv ntawm cov qhua molecules. Tsis tas li ntawd, kev txheeb xyuas roj-theem ntawm diethyl chlorophosphate (DCP), ib qho analog ntawm cov paj hlwb sarin, tau ua tiav (Daim duab 1).
Daim duab 1. Txhim kho cov fluorescence quantum efficiency thiab sensing kev ua tau zoo ntawm cov organic fluorescent me me molecule probes siv host-neeg embedded lug.
MEMS cantilever beam adsorption cov kev tshawb fawb tau pom tias qhov ua ntej ntawm tus tswv tsev-cov qhua embedded MOF sensor rau cov roj yuav tsum tau ntsuas endowed lub sojntsuam nrog zoo heev gas sensing muaj peev xwm, nrog ib tug teb lub sij hawm txog li 3 s thiab ib tug nrhiav kom tau qhov tsawg kawg nkaus. ua 1,13p. Dab tsi ntxiv, cov nyhuv caging ntawm MOF txhim kho cov kev xaiv ntawm cov tshuaj ntsuam xyuas, thiab Me4BOPHY-1＠ZIF-8 yog qhov kev xaiv heev rau cov pa cuam tshuam HCl. -8 yog qhov tsis muaj zog heev hauv kev teb rau cov pa cuam tshuam HCl, uas tsis tuaj yeem zam tau hauv cov ntaub ntawv dhau los. Lub caij no, "caging effect" ntawm cov qauv organometallic kuj ua kom cov duab zoo thiab thermal stability ntawm lub sensor. Lub thermal decomposition kub ntawm cov organofluorescent molecules tau nce los ntawm 200 degree mus rau 527 degree, thiab thawj fluorescence siv tau khaws cia txawm tias tom qab 4800 s ntawm laser irradiation nyob rau hauv lub excitation band. Nyob rau hauv cov ntsiab lus, cov ntsiab lus-cov khoom embedded tsim lub tswv yim muab ib tug nyias zaj duab xis fluorescent roj sensor nrog siab 3S (rhiab heev, selectivity, thiab stability) rau roj analytes, thiab muaj ib tug saj zawg zog txoj kev rau tsim nyias-film fluorescent sensors los siav ntau yam kev xav tau. Ib qho kev tsim qauv zoo tshaj plaws rau nyias-zaj duab xis fluorescent sensors nrog cov ntawv cog lus zoo hauv kev hnov ntxhiab roj yog npaj (Daim duab 2).
Daim duab 2. Tus tswv tsev-tus qhua embedded MOF sensor paub siab 3S (rhiab heev, selectivity, stability) synthesis
Thawj tus kws sau ntawv yog Zhengqi Shen, tus tswv tus tub ntxhais kawm ntawm peb lub koom haum, thiab cov kws sau ntawv yog Yanyan Fu, tus kws tshawb fawb, Jiangong Cheng, thiab Min Tu, tus kws tshawb fawb hluas. Txoj haujlwm no kuj tau pab los ntawm Young Researcher Kai Qi, Project Associate Xiuyun Jiang thiab Prof. Zhiyong Ntxuam ntawm Hong Kong University of Science thiab Technology. Cov hauj lwm cuam tshuam tau txais kev txhawb nqa los ntawm National Key Research thiab Development Program ntawm Ministry of Science thiab Technology (2022YFB3203500, 2021YFB3200800), National Natural Science Foundation of China (62022085, 62301544, 61831021, 22201289), Science thiab Technology Commission. (22 QA1410800).
