A sensor for carbon dioxide can include an amidine functional group.

A thin film includes a luminescent compound represented by Formula 1 and a random copolymer, wherein the random copolymer includes a first repeating unit including at least one aromatic ring, and a second repeating unit including a heteroatom including at least one lone pair of electrons,
[A].sub.n[Q].sub.m[X].sub.l  Formula 1
wherein, in Formula 1, A is a monovalent organic cation, a monovalent inorganic cation, or a combination thereof, Q is a divalent metal cation, a divalent metalloid cation, or a combination thereof, X is at least one monovalent halogen ion, n is an integer from 1 to 3, m is an integer from 1 to 2, and l is an integer from 1 to 5.

A thin film includes a luminescent compound represented by Formula 1 and a random copolymer, wherein the random copolymer includes a first repeating unit including at least one aromatic ring, and a second repeating unit including a heteroatom including at least one lone pair of electrons,
[A].sub.n[Q].sub.m[X].sub.l  Formula 1
wherein, in Formula 1, A is a monovalent organic cation, a monovalent inorganic cation, or a combination thereof, Q is a divalent metal cation, a divalent metalloid cation, or a combination thereof, X is at least one monovalent halogen ion, n is an integer from 1 to 3, m is an integer from 1 to 2, and l is an integer from 1 to 5.

The present disclosure provides a unique method of making a fine fiber that is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure also provides a unique method of coating a fine fiber with a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure further provides fine fibers wherein the entirety of the fiber is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. Also provided are filter media and filter substrates including the fine fibers.

The present disclosure provides a unique method of making a fine fiber that is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure also provides a unique method of coating a fine fiber with a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure further provides fine fibers wherein the entirety of the fiber is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. Also provided are filter media and filter substrates including the fine fibers.

Some embodiments of the disclosure provide a polymer film used for a biosensor. The polymer film has a three-dimensional network structure formed by a natural high-molecular polymer and a synthetic high-molecular polymer by a plurality of crosslinking modes. The three-dimensional network structure includes a chemically crosslinked network and a reversible physically crosslinked network, the chemically crosslinked network being formed by covalent bond crosslinking and the reversible physically crosslinked network being formed by ionic bond crosslinking. The chemically crosslinked network has covalent bond crosslinking between the synthetic high-molecular polymers and covalent bond crosslinking between the natural high-molecular polymer and the synthetic high-molecular polymer. The physically crosslinked network has ionic bond crosslinking between natural high-molecular polymers.

Some embodiments of the disclosure provide a polymer film used for a biosensor. The polymer film has a three-dimensional network structure formed by a natural high-molecular polymer and a synthetic high-molecular polymer by a plurality of crosslinking modes. The three-dimensional network structure includes a chemically crosslinked network and a reversible physically crosslinked network, the chemically crosslinked network being formed by covalent bond crosslinking and the reversible physically crosslinked network being formed by ionic bond crosslinking. The chemically crosslinked network has covalent bond crosslinking between the synthetic high-molecular polymers and covalent bond crosslinking between the natural high-molecular polymer and the synthetic high-molecular polymer. The physically crosslinked network has ionic bond crosslinking between natural high-molecular polymers.

The present disclosure provides a unique method of making a fine fiber that is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure also provides a unique method of coating a fine fiber with a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure further provides fine fibers wherein the entirety of the fiber is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. Also provided are filter media and filter substrates including the fine fibers.

The present disclosure provides a unique method of making a fine fiber that is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure also provides a unique method of coating a fine fiber with a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure further provides fine fibers wherein the entirety of the fiber is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. Also provided are filter media and filter substrates including the fine fibers.

Membranes permeable to an analyte may overlay the active sensing region of a sensor to limit the analyte flux and improve the response linearity of the sensor. Temperature variation of the analyte permeability can be problematic in some instances. Polymeric membrane compositions having limited variation in analyte permeability as a function of temperature may comprise: a polymer backbone comprising one or more side chains that comprise a heterocycle; and an amine-free polyether arm appended, via an alkyl spacer or a hydroxy-functionalized alkyl spacer, to the heterocycle of at least a portion of the one or more side chains.