Tsis tshua muaj siab heev \ / tsawg kub thiab lub teeb kis cuam tshuam rau cov qauv ntawm cov qauv ruaj khov: Theory & Methodolog

Kev kawm sib txawv ntawm kev kuaj xyuas qhov ntsuas kev ntsuas (piv txwv li, cov khoom siv hlau) kev kub ntxhov, thiab kev tsim khoom, ntim khoom, thiab kev tswj hwm lub neej. High- thiab qis-kub cia tuaj yeem ntxias cov tshuaj lom neeg saib tsis taus, kev hloov pauv qauv, lossis theem sib cais; Kev siv lub teeb pom kev yuav ua rau cov kev sib tw sib txawv lossis cov tshuaj tiv thaiv dawb-radical, ua rau photodegradation. Systematically soj ntsuam cov teebmeem ntawm lub cev ntawm 40 ° C, -20 ° C, thiab lub teeb ntawm ntau cov piv txwv hom yog qhov tseem ceeb thiab kev ntseeg tau. Daim ntawv no tsom rau cov theoretical tshuab thiab txoj kev coj ua rau peb cov xwm txheej huab, thiab cov duab sib txuas, thiab cov tswv yim sib txuas lus thiab ntsuas kev ntsuas.

1. Yuav ua li cas yog qhov kub siab (40 ° C) cuam tshuam rau cov molecules thiab hlau ions?

Kev ntsuas kub kub nrawm nrawm, feem ntau ua rau orgalic molecuent degradation thiab destabilizing cov khoom xyaw nquag. Hauv kev soj ntsuam kev ruaj khov, 40 ° C \ / 75% Rh yog siv los ua kev nrawm nrawm los twv seb tus cwj pwm ntev. Kev nce tshav kub tuaj yeem ua rau muaj cov oxidation, hydrolysis, lub cev qhuav dej, lossis isomerization hauv cov molecules me me, thiab tseem yuav hloov cov kev sib koom tes cov tub rog thiab solubility.

1.1 Cov kev cuam tshuam tshwj xeeb ntawm cov lwg me me

• Oxidative degradation:Lipids lossis phenolics tau yooj yim oxidize ntawm 40 ° C, tsim cov khoom lag luam.
  
  

• Hydrolysis:Ester lossis Amide Bonds Cleave yim yooj yim dua thaum muaj cua sov, tawm hws, lossis dej cawv.
  
  

• Isomerization:CIS-trans kev hloov pauv lossis kev sib tw tuaj yeem tuaj yeem txo cov haujlwm.
  
  

Piv Txwv: Rapamycin (thiab nws cov IV DRRUG CCI-779) khaws cia rau 40 ° C-1% thiab ~ 4.3% Yog li, cov ntsiab lus nquag thiab cov tseem ceeb ib qho degradants yuav tsum tau saib xyuas kom zoo raws li kev ntxhov siab kub.

1.2 Cov Ntsiab Lus Tseem Ceeb ntawm Kev Kho Mob Hlau-Ion

• Complex stability:Hlau-liigand sib luag sib luag sib txawv sib txawv nrog kub; Tsis muaj zog cov unlexes yuav tshem tawm, tso tawm cov kabmob pub dawb.
  
  

• Solubility & nag lossis daus:Thaum cov kua hlau feem ntau yaj tau ntau dua t, ib co (piv txwv li, hydroxides, tej zaum yuav yauv kis tau los yog nag lossis daus. Piv txwv li carbonate, cov ntaub ntawv sib txawv ntawm cov hydrates sib txawv ntawm ntau kub, cuam tshuam los nag morphology.
  
  

• Oxidation State kev hloov pauv:Fe²⁺ tuaj yeem oxidize rau Fe³⁺ ntawm Senterated T, nag los yog insoluble hydroxides thiab hloov kho on sib npaug.
  
  

Ntawm 40 ° C, saib xyuas cov kev sib cais thiab cov nag los nag los ua kom txhob muaj kev hloov pauv lossis kev hloov pauv.

1.3 Tsim Cov Kev Ntsuam Xyuas Mob Siab Kub & Kev Ntsuas Cov Qauv

Cov kev qhia sib xws suav nrog:

• DSC (Kev ntsuas tus calorimetry sib txawv):Kev ntsuas thermal stability, theem hloov, thiab kev txiav txim siab rau kev nkag siab.
  
  

• UV-VI SPECTROPHOTOMETRY:Txoj kev hloov pauv lossis cov xim hloov pauv kom muaj nuj nqis kom muaj nuj nqis rau kev ua kom nquag lossis ua tsis tiav lub sijhawm.
  
  

• ICP-MS \ / AAS:Txawm li cas los xij-ion ntau, ntes tau poob lossis precipitates npaj ua ntej thiab tom qab kev kho cua sov.
  
  

• HPLC \ / GC-MS:Cais tawm thiab qhia txog cov khoom lag luam ua rau, suav nrog niam txiv sib txuas lus.
  
  

Piv txwv li cov txheej txheem: Muab cov hnoos qeev hauv 40 ° Ca dej da dej rau kev laus sai; Lub sij hawm khiav DSC Scans rau thermal cov xwm txheej, ntsuas UV-Vis nqus, thiab siv ICP-ms los ua raws li cov hlau-ion. Ua ke cov hau kev no muaj cov kev pom zoo ntawm cov kev hloov pauv kub.

2. Kev ua tiav ntu (-20 ° C) cuam tshuam rau cov qauv kev ruaj khov?

Ntawm -20 ° C, khov tshuab lub xeev, muaj peev xwm ua rau kev sib cais lossis kev hloov chaw ruaj khov. Cov dej khov muaj kua nyeem tsis meej meej rau kev Solutes, spiking hauv zos concentration thiab pH, uas tuaj yeem ua rau cov kev tsis txaus siab lossis precipitates. Rov ua kom khov-thaw neeg yuav cuam tshuam cov qauv qauv thiab kev ntseeg siab.

2.1 Khov-thaws cov teebmeem ntawm cov lwg me me

Thaum lub sij hawm khov-thaws, solutes fully nyob ib ncig dej khov, feem ntau recrystallizing lossis aggregating raws li cov yaj. Macroscopically Qhov no zoo nkaus li tsis muaj zog lossis nag lossis daus; Microscopically, molecular rearrangents lossis kev puas tsuaj tshwm sim. Kev tshawb fawb hauv DMOs-based cov tsev qiv ntawv qhia ntau cov neeg khov-concles kom zoo dua (vim muaj kev mob siab lossis nag lossis daus) piv rau kev tswj khov. Systems puas tau mus rau theem sib cais yuav tsum ua kom tswj thiab ruaj ntseg saib xyuas.

2.2 cov txheej txheem hauv kev daws teeb meem hlau-ion

ICE tsim thawb cov hlau ions thiab ntxiv rau hauv cov kua rau hauv cov kua, ib pliag nce h ⁺⁺⁺⁺. Rau qhov xoom-valent hlau (ZVI), khov-thau zoo nkauj cov protons uas yaj tag nrho cov txheej passivation; Tso tawm hlau (piv txwv li, ni²⁺) desorb, thiab reactive FE tuaj yeem rov ua dua lawv. Xws li ion viav vias tuaj yeem hloov cov tshuaj lom thiab cov lus qhia kom meej, cuam tshuam cov kev daws teeb meem tag nrho.

2.3 Ntsuas kom khov-thaws kev cuam tshuam

• DLS (Dynamic lub teeb tawg):Taug qab particle-loj hloov ua ntej npaj ua ntej thiab tom qab thaws kom paub kev sib sau ua ke.
  
  

• ICP-MS \ / AAS:Kev ntsuas hlau-ion concentration sib txawv ua ntej thiab tom qab khov-thaws kom ntsuas cov kev poob lossis dej nag lossis daus.
  
  

• Quantitative NUM-THAWJ CYCLING:Ua raws li cov lus qhia ich (piv txwv li (piv txwv li, peb lub voj voog: -10 rau -20 ° C rau 2days, tom qab ntawd 40 ° C rau 2PLING tom qab txhua lub voj voog los ntsuas kev ruaj ntseg.
  
  

Los ntawm cov hau kev no, cov lab las tuaj yeem ntsuas qhov chaw khov-thaws thiab ua kom zoo kaw \ / thauj thauj.

3. Yuav ua li cas ntsuas ntsuas Photogradation tus nqi ntawm cov duab sib txuas?

Tebcias nrog conjugated π-nruab-cov khoom siv uas muaj ntxhiab, lossis cov chaw sib xyaw ua ke, photoXidation, lossis pub dawb-radical cov tshuaj tiv thaiv. Nkag siab cov txheej txheem no yog qhov tseem ceeb rau kev sim teeb lub teeb pom kev zoo thiab kwv yees cov ntaub ntawv.

3.1 Qhov sib txuas uas yog lub teeb-rhiab & vim li cas?

• Dyes nrog conjugated cov kab ke lossis hlau-kev sib koom tes sib xyaw ua ke yooj yim nqus lub teeb thiab clouge rings lossis sib koom tes, tsim radicals.
  
  

• Cov roj tsw qab hauv cov tshuaj ntsuab tuaj yeem yaj lossis decompose hauv qab UV \ / cua sov.
  
  

• Molecules muaj cov nyiaj tsis zoo (piv txwv li, nitroso, peroxide (peroxide) tshwj xeeb tshaj yog siv rau photodegradation.
  Txhua tus qauv nrog cov chromophores lossis cov ntawv cog lus pov thawj duab tuaj yeem yauv ua duab yees duab, ntxiv, yog cov tsiaj txhu lossis cov tsiaj txhu kho.
  
  
  

3.2 Cov qauv ntsuas hluav taws xob ua qauv

Rau Ihich Q1B:

• Yuam kev-degradation theem: Ua piv txwv rau lub teeb hnyav kom qhia txhua yam tsis muaj peev xwm.
  
  

• Kev lees paub theem: Thov ib qho kev txiav txim siab ntawm lub teeb kom ntsuas tau qhov ruaj khov.
  Cov Ntsiab Lus Tseem Ceeb:
  
  

• Lub teeb ci teeb: Simulated tshav ntuj (D65 \ / id65 fluorescent teeb) nrog kev txiav cov roj fluor <320nm, lossis UVB \ thiab pom cov teeb sib xyaw.
  
  

• Qauv teeb tsa: Qhov chaw hauv inert, pob tshab ntim, nteg tiaj tus rau kev sib tw sib txawv, nrog kev tswj hwm tsaus. Yog tias muaj kev hnyav nrawm tshwm sim, luv luv lub sij hawm \ / siv.
  
  

• Noj tshuaj soj ntsuam: ntsuas tsis zoo: calibrate iradiance (E.G., nrog quinine sulfate daws) thiab sau lub teeb rau hauv j \ / m² kom ntseeg tau tias rov ua kom rov ua tau.
  
  

Kev tswj nruj thiab tsaus ntuj \ txiv neej \ / lub teeb sib piv kev muab cov ntaub ntawv txhim khu

3.3 photOregradation Kinetic qauv

PhotoGradation feem ntau ua raws li thawj-xaj kinetics:

C (t) = c0e-ktc (t) = c_0 e {- kt}

qhov twg k yog tus nqi tas li. Cov tshuaj tiv thaiv npoo-nruab nrab yuav haum rau longmuir-hinshelwood qauv. Los ntawm taug qab kev xav ntawm UV-VIS lossis HPLC-MS dhau sijhawm, K tuaj yeem haum. Cov duab yees duab Quantum tawm (φ) -molecules reased per photon nqus-yog xam los ntawm kev sib piv cov kev mob siab tsis raws cai. Cov teeb meem no rau qhov ntsuas qhov teeb pom kev zoo.

4. Pom zoo kom muaj kev ntsuas-ntsuas kev ntsuas

Ua ke ntau cov txheej txheem txheeb xyuas ntau yam rau cov ntaub ntawv ruaj khov tag nrho:

• High-t \ / khov-thaws:
  - DSC rau thermal cov xwm txheej \ / Theem Hloov
  - UV-VIS los saib xyuas cov nquag lossis ion concentration
  - ICP-MS \ / AAS rau cov hlau ntau yam
  - DLS rau particle \ / sib sau ua ke
  
  

• Photostility:
  - UV-VI KIFETE AROMORBANCANS
  - HPLC-ms rau kev ua kom pom tseeb thiab cov khoom seem
  - Quantum tawm los thiab tus nqi them rov qab raws li kev suav nrog lub teeb ntsuas hluav taws xob
  
  

Nco ntsoov tswj kev nruj (tsaus caj, sib txawv, thiab kev kho mob tshwj xeeb rau kev siv tau.

5. Kev nthuav qhia zoo ntawm cov ntaub ntawv ruaj khov

Txhawm rau tshawb pom kom meej meej, npaj:

• Concentration vs. Lub Sij Hawm Lub Sij Hawm: Sib piv cov theem nquag lossis ion qib qis dua 40 ° C vs. -20 ° C.
  
  

• Photheregradation kinetics curves: qhia txog kev pom zoo lossis nqus tau thiab nqus tau lub sijhawm \ / / / / suav nrog cov teeb meem logarithmic.
  
  

• DSC ThermoGrams: Zaub Endo \ / Exotherms rau theem hloov pauv lossis kev txiav txim siab rau cua sov.
  
  

• Txheej Txheem Diam duab: Ua ntej khov-thaw kev voj voog cuam tshuam lossis cia \ / thauj khoom workfflows.
  
  

Tsim tau zoo-tsim qauv kev txhais lus thiab kev sib tham.

Tag

Cov kev cuam tshuam sib txawv cuam tshuam kev sib cav sib txawv hauv kev sib txawv: kev siv hluav taws xob ua kom muaj kev cuam tshuam rau kev siv hluav taws xob (tshwj xeeb yog cov duab hluav taws xob ua haujlwm) thiab cov qauv siv hlau sib txuas). Kev ntim khoom thiab thauj yuav tsum tau ua kom haum: cov khoom siv rhiab ntawm cov tshuab hluav taws xob, thiab khov kho cov tshuab hauv cov saw txias lossis kua-nitrogen teeb. Kev ua haujlwm yav tom ntej yuav tsum tshawb xyuas kev sib xyaw ua ke (piv txwv li, cua sov + lub teeb) rau cov lus qhia tau zoo tshaj plaws.

Cov Ntawv Ntxiv

• Chav nyob:Lub teeb tshuaj hauv j \ / m² lossis Lux-teev; tus nqi tas li k nyob rau hnub; Quantum tawm los φ; cov ntsiab lus tseem ceeb raws li%.
  
  

• Qauv Pawg:Txheeb xyuas cov txheej txheem ib qeb (API, ib puag ncig organics, cov khoom siv hlau) thiab cov kuab tshuaj kom muab cov lus pom zoo cia khoom.
  
  

References: Raws li Ich Q1A \ / q1b cov lus qhia, uas ruaj khov Annex 10, thiab cov ntaub ntawv tam sim no.