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Visible-Near-Infrared Range Whispering Gallery Resonance From Photonic μ-Sphere Cavities Self-Assembled From a Blend of Polystyrene and Poly[4,7-bis(3-octylthiophene-2-yl)benzothiadiazole-co-2,6-bis(pyrazolyl)pyridine] Coordinated to Tb(acac)3

Visible-Near-Infrared Range Whispering Gallery Resonance From Photonic μ-Sphere Cavities Self-Assembled From a Blend of Polystyrene and Poly[4,7-bis(3-octylthiophene-2-yl)benzothiadiazole-co-2,6-bis(pyrazolyl)pyridine] Coordinated to Tb(acac)3

Yemineni S L V Narayana, Dasari Venkatakrishnarao, Arani Biswas, Mahamad Ahamad Mohiddon, Nirmal Viswanathan, Rajadurai Chandrasekar

ACS Appl Mater Interfaces. 2016 Jan 13;8(1):952-8.

PMID: 26694108

Abstract:

A novel red emitting copolymer (P1) was prepared (Mn ∼ 10.7 kDa) by copolymerizing tridentate ligand, namely 2,6-bis(pyrazolyl)pyridine (BPP) with 4,7-bis(2-ethynyl-5-thienyl)-2,1,3-benzothiadiazole. This copolymer readily formed an orange yellow emitting metal containing conjugated polymer (P1.Tb) with Tb(acac)3. Further, a judicial blend of P1.Tb with polystyrene and its subsequent self-assembly in THF/water produced microspheres with smooth surface area. Interestingly, continuous wave laser excitation of a single microsphere displayed whispering-gallery-mode (WGM) resonance modes over a broad wavelength range covering visible (Vis) and near-infrared (NIR) regions (0.550-0.875 μm). The estimated Q factor was up to 700, which is very high for a metal containing conjugated polymer (MCCP)-based optical gain medium.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP288071874	4,7-Bis(2-bromo-5-thienyl)-2,1,3-benzothiadiazole		288071-87-4	Price

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