Bisignate Surface-Enhanced Raman Optical Activity with Analyte-Capped Colloids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F25%3A00618275" target="_blank" >RIV/61388963:_____/25:00618275 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/25:73630406 RIV/60461373:22340/25:43933698

Výsledek na webu

<a href="https://doi.org/10.1021/acsnano.4c19027" target="_blank" >https://doi.org/10.1021/acsnano.4c19027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsnano.4c19027" target="_blank" >10.1021/acsnano.4c19027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bisignate Surface-Enhanced Raman Optical Activity with Analyte-Capped Colloids

Popis výsledku v původním jazyce

Spectroscopic detection of chiral compounds is often hampered by a low sensitivity. For Raman optical activity (ROA), the signal can be dramatically increased in surface-enhanced experiments. So far, however, reproducible surface-enhanced ROA (SEROA) spectra were obtained for a reporter molecule only via induced chirality, and the intensities were just proportional to the Raman scattering. In the present study, we show that the signal can be substantially increased if colloidal silver nanoparticles are prepared already in the presence of a chiral analyte. In this case, both the analyte's and reporter's bands are visible. In addition, some experiments provided bisignate SEROA patterns, thus significantly enhancing information about the molecular structure provided by this spectroscopic method. Increased electronic circular dichroism (ECD) of the capped aggregated colloids suggests that ECD and polarized Raman scattering (ECD-Raman) contribute to the monosignate SEROA intensities, while well-dispersed nonaggregating colloids are important for observation of true (bisignate) molecular vibrational SEROA.

Název v anglickém jazyce

Bisignate Surface-Enhanced Raman Optical Activity with Analyte-Capped Colloids

Popis výsledku anglicky

Spectroscopic detection of chiral compounds is often hampered by a low sensitivity. For Raman optical activity (ROA), the signal can be dramatically increased in surface-enhanced experiments. So far, however, reproducible surface-enhanced ROA (SEROA) spectra were obtained for a reporter molecule only via induced chirality, and the intensities were just proportional to the Raman scattering. In the present study, we show that the signal can be substantially increased if colloidal silver nanoparticles are prepared already in the presence of a chiral analyte. In this case, both the analyte's and reporter's bands are visible. In addition, some experiments provided bisignate SEROA patterns, thus significantly enhancing information about the molecular structure provided by this spectroscopic method. Increased electronic circular dichroism (ECD) of the capped aggregated colloids suggests that ECD and polarized Raman scattering (ECD-Raman) contribute to the monosignate SEROA intensities, while well-dispersed nonaggregating colloids are important for observation of true (bisignate) molecular vibrational SEROA.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA25-15726S" target="_blank" >GA25-15726S: Prozkoumání nových forem Ramanovy optické aktivity</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Nano

ISSN

1936-0851

e-ISSN

1936-086X

Svazek periodika

19

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

10412-10420

Kód UT WoS článku

001440338300001

EID výsledku v databázi Scopus

2-s2.0-105001078790