A hydrogen-bond-stabilized chiral tetrakis Eu(iii) complex with strong circularly polarized luminescence

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F25%3A00643014" target="_blank" >RIV/61388963:_____/25:00643014 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1039/D5DT02294K" target="_blank" >https://doi.org/10.1039/D5DT02294K</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5dt02294k" target="_blank" >10.1039/d5dt02294k</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A hydrogen-bond-stabilized chiral tetrakis Eu(iii) complex with strong circularly polarized luminescence

Popis výsledku v původním jazyce

We report the synthesis and properties of a hydrogen-bond-stabilized chiral tetrakis Eu(III) complex with enhanced circularly polarized luminescence (CPL). It is based on a Eu(III) tris[3-(heptafluoropropylhydroxymethylene)-camphorate] complex modified with tetrabutylammonium and imidazolium counterions. While the bulky tetrabutylammonium cation preserves the parent tris-diketonate framework, the smaller imidazolium cation forms a novel chiral tetrakis Eu(III) complex through stable NH⋯O[double bond, length as m-dash]C hydrogen bonding between the imidazolium N–H donor and the diketonate carbonyl acceptor. A single-crystal X-ray diffraction study indicates a square-antiprismatic geometry. CPL spectra, recorded with a Raman optical activity (ROA) spectrometer under 532 nm excitation, reveal an extremely high dissymmetric factor of 1.26 at 595 nm. In chloroform solution, additional ROA signals were detected, attributed to CPL-induced Raman scattering from the solvent. These properties highlight the convenience of hydrogen-bond-assisted stabilization. The results document an efficient approach for tuning CPL-active lanthanide complexes and demonstrate the methodological advantage of ROA-based CPL detection.

Název v anglickém jazyce

A hydrogen-bond-stabilized chiral tetrakis Eu(iii) complex with strong circularly polarized luminescence

Popis výsledku anglicky

We report the synthesis and properties of a hydrogen-bond-stabilized chiral tetrakis Eu(III) complex with enhanced circularly polarized luminescence (CPL). It is based on a Eu(III) tris[3-(heptafluoropropylhydroxymethylene)-camphorate] complex modified with tetrabutylammonium and imidazolium counterions. While the bulky tetrabutylammonium cation preserves the parent tris-diketonate framework, the smaller imidazolium cation forms a novel chiral tetrakis Eu(III) complex through stable NH⋯O[double bond, length as m-dash]C hydrogen bonding between the imidazolium N–H donor and the diketonate carbonyl acceptor. A single-crystal X-ray diffraction study indicates a square-antiprismatic geometry. CPL spectra, recorded with a Raman optical activity (ROA) spectrometer under 532 nm excitation, reveal an extremely high dissymmetric factor of 1.26 at 595 nm. In chloroform solution, additional ROA signals were detected, attributed to CPL-induced Raman scattering from the solvent. These properties highlight the convenience of hydrogen-bond-assisted stabilization. The results document an efficient approach for tuning CPL-active lanthanide complexes and demonstrate the methodological advantage of ROA-based CPL detection.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA23-05378S" target="_blank" >GA23-05378S: Syntéza a charakterizace lanthanidové luminescenční sondy pro biomolekulární Ramanovu spektroskopii a zobrazování</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

Dalton Transactions

ISSN

1477-9226

e-ISSN

1477-9234

Svazek periodika

54

Číslo periodika v rámci svazku

48

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

17932-17940

Kód UT WoS článku

001619434700001

EID výsledku v databázi Scopus

2-s2.0-105022248092