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Near-infrared luminescence of lanthanide calcein and lanthanide dipicolinate complexes doped into a silica-PEG hybrid material

(2004) CHEMISTRY OF MATERIALS. 16(8). p.1531-1535
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Abstract
The near-infrared luminescence of lanthanide complexes of 4',5'-bis[N,N-bis(carboxymethyl)aminomethyl] fluorescein (calcein) and pyridine-2,6-dicarboxylic acid (dipicolinic acid, dpa) doped in a hybrid sol-gel material was investigated. The silica-poly(ethylene glycol) (silica-PEG) inorganic-organic materials were prepared at a neutral pH. The lanthanide ions are well shielded from the environment by the calcein and dpa ligands, and the complexes are stable in the sol-gel matrix after preparation. The dysprosium and neodymium dipicolinate complexes showed near-infrared luminescence (NIR-luminescence) by direct excitation to the 4f-levels. The ytterbium dipicolinate complex doped in the sol-gel showed NIR-luminescence by excitation of the ligand in the UV region. All other tested lanthanide ions (Ln = Pr, Sm, Er, Ho) did not show luminescence. Neodymium and ytterbium complexes with calcein show intense NIR-luminescence when the ligand is excited by visible light. The corresponding erbium complex doped in the silica-PEG matrix also showed NIR-luminescence at 1525 nm. No NIR-luminescence could be detected for the other lanthanide complexes doped in the matrix (Ln = Pr, Sm, Dy, Ho).
Keywords
OPTICAL-PROPERTIES, ENERGY-TRANSFER, F-F TRANSITIONS, SOL-GEL METHOD, GLASS-FILMS, EMISSION, STATE, INTENSITIES, COATINGS, IONS

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Chicago
Driesen, Kris, Rik Van Deun, Christiane Görller-Walrand, and Koen Binnemans. 2004. “Near-infrared Luminescence of Lanthanide Calcein and Lanthanide Dipicolinate Complexes Doped into a silica-PEG Hybrid Material.” Chemistry of Materials 16 (8): 1531–1535.
APA
Driesen, K., Van Deun, R., Görller-Walrand, C., & Binnemans, K. (2004). Near-infrared luminescence of lanthanide calcein and lanthanide dipicolinate complexes doped into a silica-PEG hybrid material. CHEMISTRY OF MATERIALS, 16(8), 1531–1535.
Vancouver
1.
Driesen K, Van Deun R, Görller-Walrand C, Binnemans K. Near-infrared luminescence of lanthanide calcein and lanthanide dipicolinate complexes doped into a silica-PEG hybrid material. CHEMISTRY OF MATERIALS. 2004;16(8):1531–5.
MLA
Driesen, Kris, Rik Van Deun, Christiane Görller-Walrand, et al. “Near-infrared Luminescence of Lanthanide Calcein and Lanthanide Dipicolinate Complexes Doped into a silica-PEG Hybrid Material.” CHEMISTRY OF MATERIALS 16.8 (2004): 1531–1535. Print.
@article{1190292,
  abstract     = {The near-infrared luminescence of lanthanide complexes of 4',5'-bis[N,N-bis(carboxymethyl)aminomethyl] fluorescein (calcein) and pyridine-2,6-dicarboxylic acid (dipicolinic acid, dpa) doped in a hybrid sol-gel material was investigated. The silica-poly(ethylene glycol) (silica-PEG) inorganic-organic materials were prepared at a neutral pH. The lanthanide ions are well shielded from the environment by the calcein and dpa ligands, and the complexes are stable in the sol-gel matrix after preparation. The dysprosium and neodymium dipicolinate complexes showed near-infrared luminescence (NIR-luminescence) by direct excitation to the 4f-levels. The ytterbium dipicolinate complex doped in the sol-gel showed NIR-luminescence by excitation of the ligand in the UV region. All other tested lanthanide ions (Ln = Pr, Sm, Er, Ho) did not show luminescence. Neodymium and ytterbium complexes with calcein show intense NIR-luminescence when the ligand is excited by visible light. The corresponding erbium complex doped in the silica-PEG matrix also showed NIR-luminescence at 1525 nm. No NIR-luminescence could be detected for the other lanthanide complexes doped in the matrix (Ln = Pr, Sm, Dy, Ho).},
  author       = {Driesen, Kris and Van Deun, Rik and G{\"o}rller-Walrand, Christiane and Binnemans, Koen},
  issn         = {0897-4756},
  journal      = {CHEMISTRY OF MATERIALS},
  keyword      = {OPTICAL-PROPERTIES,ENERGY-TRANSFER,F-F TRANSITIONS,SOL-GEL METHOD,GLASS-FILMS,EMISSION,STATE,INTENSITIES,COATINGS,IONS},
  language     = {eng},
  number       = {8},
  pages        = {1531--1535},
  title        = {Near-infrared luminescence of lanthanide calcein and lanthanide dipicolinate complexes doped into a silica-PEG hybrid material},
  url          = {http://dx.doi.org/10.1021/cm031166c},
  volume       = {16},
  year         = {2004},
}

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