Description

3H-Indolium, 1-ethyl-2-[(Z)-[3-[(Z)-(1-ethyl-1,3-dihydro-3,3-dimethyl-2H-indol-2-ylidene)methyl]-2-hydroxy-4-oxo-2-cyclobuten-1-ylidene]methyl]-3,3-dimethyl-, inner salt is a sophisticated polymethine dye belonging to the cyanine family, characterized by its unique cyclobutenedione bridge. This compound matters for its exceptional photophysical properties, including strong near-infrared (NIR) absorption and high molar extinction coefficients, making it a critical functional material. It is primarily needed by researchers and manufacturers in the fields of advanced optical materials, photovoltaics, and non-linear optics (NLO), where precise light-matter interaction is paramount.

Application

• NIR-Absorbing Dyes & Pigments: As a key chromophore for advanced coatings, security inks, and optical filters requiring specific near-infrared light absorption.
• Organic Photovoltaic (OPV) Materials: Serving as an electron donor or acceptor component in the active layer of solar cells due to its tunable band gap and light-harvesting efficiency.
• Non-Linear Optical (NLO) Materials: For applications in optical limiting, frequency doubling, and electro-optic modulation devices.
• Laser Dyes & Optical Sensors: Utilization in tunable dye lasers and as a sensing moiety in fluorescence-based detection systems.
• Photodynamic Therapy (PDT) Research: Investigation as a potential photosensitizer agent for targeted medical treatments.
• Molecular Probes & Bioimaging: Development of fluorescent tags and probes for cellular imaging and diagnostic assays.

Basic Information

Item	Details
Product Name	3H-Indolium, 1-ethyl-2-[(Z)-[3-[(Z)-(1-ethyl-1,3-dihydro-3,3-dimethyl-2H-indol-2-ylidene)methyl]-2-hydroxy-4-oxo-2-cyclobuten-1-ylidene]methyl]-3,3-dimethyl-, inner salt
CAS No.	2234271-14-6
Molecular Formula	C31H34N2O3
Molecular Weight	482.62 g/mol
Synonyms	Cyclobutenedione-bridged Cyanine Dye; NIR Cyanine Dye with Cyclobutenedione Bridge; (Z)-1-Ethyl-2-((Z)-3-((E)-1-ethyl-3,3-dimethylindolin-2-ylidene)methyl)-2-hydroxy-4-oxocyclobut-2-en-1-ylidene)methyl)-3,3-dimethyl-3H-indol-1-ium; Inner Salt Form of Heptamethine Cyanine Analog; Advanced Polymethine Dye; Optical Material Intermediate; 2234271-14-6 (CAS)
EINECS	Contact for details

Quality Control

Our high-purity functional dyes are produced under strict quality management systems. Each batch undergoes comprehensive analytical characterization, including HPLC for purity verification, NMR and MS for structural confirmation, and UV-Vis-NIR spectroscopy to validate key photophysical properties. We provide a detailed Certificate of Analysis (COA) with every shipment, ensuring traceability and compliance with your research and development specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed in a dry environment to prevent degradation. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	Dark green to black crystalline powder
Identification (HPLC)	Retention time corresponds to reference standard
Identification (NMR)	Spectrum consistent with structure
Purity (HPLC, Area %)	≥ 95.0%
λmax (Absorption)	Contact for details
Moisture Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.